🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 18 (from laksa193)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa018.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/","crawl_time":1775781768,"first_indexed_time":1538960044,"http_code":200,"src_unparsed":"org,seattlechildrens!www,\/conditions\/a-z\/immunization-reactions\/ s443","src_root_hash":"14744512740537047218","history_drop_reason":null,"meta_title":"Immunization Reactions","meta_descriptions":[],"attrs_boilerpipe_text":"Is this your child's symptom?\nReactions to a recent immunization (vaccine)\nMost are reactions at the shot site (such as pain, swelling, redness)\nGeneral reactions (such as a fever or being fussy) may also occur\nReactions to These Vaccines are Covered:\nChickenpox (varicella) virus\nCOVID-19 virus\nDTaP (Diphtheria, Tetanus, Pertussis)\nHemophilus influenzae type b\nHepatitis A virus\nHepatitis B virus\nHuman Papilloma virus\nInfluenza virus\nMMR (Measles, Mumps, Rubella)\nMeningococcal\nPolio virus\nPneumococcal\nRotavirus\nTuberculosis (BCG vaccine)\nSymptoms of Vaccine Reactions\nLocal Reactions.\nShot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days.\nFever\nwith most vaccines begins within 24 hours and lasts 1 to 2 days.\nDelayed Reactions.\nWith the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks.\nAnaphylaxis.\nSevere allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions.\nVaccine Free App\nVaccines on the Go app from Children's Hospital of Philadelphia\nThis free app can answer any vaccine questions you may have\nIt is fact-based and up-to-date\nWhen to Call for Immunization Reactions\nCall 911 Now\nTrouble breathing or swallowing\nNot moving or very weak\nCan't wake up\nYou think your child has a life-threatening emergency\nCall Doctor or Seek Care Now\nFever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen.\nFever higher than 104° F (40° C)\nFever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids)\nCrying nonstop lasts more than 3 hours\nRotavirus vaccine followed by vomiting or severe crying\nYour child looks or acts very sick\nYou think your child needs to be seen, and the problem is urgent\nContact Doctor Within 24 Hours\nRedness around the shot becomes larger and more painful to touch after 3 days\nFever lasts more than 3 days\nFever returns after being gone more than 24 hours\nMeasles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days\nYou think your child needs to be seen, but the problem is not urgent\nContact Doctor During Office Hours\nRedness or red streak around shot is larger than 2 inches (5 cm)\nRedness, swelling or pain is getting worse after 3 days\nFussiness from vaccine lasts more than 3 days\nYou have other questions or concerns\nSelf Care at Home\nNormal immunization reaction (mild redness and swelling, fever)\nCare Advice for Immunization Reactions\nTreatment for Common Immunization Reactions\nWhat You Should Know About Common Shot Reactions:\nImmunizations (vaccines) protect your child against serious diseases.\nPain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal.\nAll of these reactions mean the vaccine is working.\nYour child's body is making new antibodies to protect against the real disease.\nMost of these symptoms will only last 2 or 3 days.\nThere is no need to see your doctor for normal reactions, such as redness or fever.\nHere is some care advice that should help.\nVaccine Site Reaction: Treatment\nSome pain, swelling and skin redness at the injection site is\nnormal.\nIt means the vaccine is working.\nMassage:\ngently massage the injection site 3 or more times a day.\nHeat:\nfor pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice.\nNo Pain Medicine:\ntry not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen.\nHives at the Shot Site:\nif itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed.\nFever with Vaccines: Treatment\nFever with vaccines is\nnormal\n, harmless and probably helpful. Reason: fever speeds up your body's immune system.\nFever with most vaccines begins within 12 hours and lasts 1 to 2 days.\nFor low grade fevers of 100-102&deg F (37.8 to 39&deg C), do not give fever medicines.  Reason: they may reduce your body's normal immune response.\nFor fevers higher than 102° F (39° C), medicine may be given for discomfort.  If needed, use acetaminophen.\nFluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk.\nClothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops.\nGeneral Symptoms from Vaccines:\nAll vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site.\nSome children sleep more than usual. A decreased appetite and activity level are also common.\nThese symptoms are normal. They do not need any treatment.\nThey will usually go away in 24-48 hours.\nCall Your Doctor If:\nRedness becomes larger than 2 inches (5 cm)\nRedness becomes more painful after 3 days\nFever starts after 2 days (or lasts more than 3 days)\nRedness or pain lasts more than 7 days\nYou think your child needs to be seen\nYour child becomes worse\nSpecific Immunization Reactions\nChickenpox Vaccine:\nPain or swelling at the shot site for 1 to 2 days. (20% of children)\nMild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C).\nNever give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease.\nChickenpox-like rash (usually 2 red bumps) at the shot site (3%)\nChickenpox-like rash (usually 5 red bumps) scattered over the body (4%)\nThis mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days.\nChildren with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others.\nException: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox.\nCaution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage.\nCOVID-19 Vaccine\nInjection site reactions.\nPain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days.\nGeneral body symptoms after the second dose.\nFever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep.\nGeneral symptoms start at about 24 hours. They usually last 1 day, sometimes 2.\nVaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine.\nVaccines with one dose. Side effects were the same type, but a little less often.\nBooster shots. Side effects much the same.\nThe vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath.\nIt is impossible to get COVID-19 from the vaccine.  Reason: there is no live COVID-19 virus in the vaccine.\nSevere allergic reactions to the vaccine are very rare.\nDiphtheria, Tetanus, Pertussis (DTaP) Vaccine:\nThe following harmless reactions to DTaP can occur:\nPain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days.\nFever (in 25% of children) and lasts for 24 to 48 hours\nMild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours.\nLarge swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally.\nThe large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%).\nThis is not an allergy. Future DTaP vaccines are safe to give.\nHemophilus Influenza Type B Vaccine (Hib):\nNo serious reactions reported.\nSore injection site or mild fever only occurs in 2% of children.\nHepatitis A Vaccine:\nNo serious reactions reported.\nSore injection occurs in 20% of children.\nLoss of appetite occurs in 10% of children.\nHeadache occurs in 5% of children.\nMost often, no fever is present.\nIf these symptoms occur, they most often last 1-2 days.\nHepatitis B Virus Vaccine (HBV):\nNo serious reactions reported.\nSore shot site occurs in 30% of children and mild fever in 3% of children.\nFever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined.\nInfluenza Virus Vaccine:\nPain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children.\nMild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children.\nNasal Influenza Vaccine:\ncongested or runny nose, mild fever.\nMeasles, Mumps and Rubella Vaccine (MMR):\nThis shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot.\nMild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days.\nThe mild pink rash is mainly on the trunk and lasts 2 or 3 days.\nNo treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash.\nCall Your Doctor If:\nRash changes to blood-colored spots\nRash lasts more than 3 days\nMeningococcal Vaccine:\nNo serious reactions.\nSore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children.\nMild fever occurs in 5%, headache in 40% and joint pain in 20%\nThe vaccine never causes meningitis.\nPapillomavirus Vaccine:\nNo serious reactions.\nSore injection site for few days in 90%.\nMild redness and swelling at the shot site (in 50%).\nFever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%.\nHeadache in 30%.\nPneumococcal Vaccine:\nNo serious reactions.\nPain, tenderness, swelling or redness at the injection site in 20%.\nMild fever less than 102° F (39° C) in 15% for 1-2 days.\nPolio Vaccine:\nPolio vaccine given by shot sometimes causes some muscle soreness.\nPolio vaccine given by mouth is no longer used in the U.S.\nRotavirus Vaccine:\nMost often, no serious reactions to this vaccine given by mouth.\nMild diarrhea or vomiting for 1 to 2 days in 3%.\nNo fever.\nRare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying.\nBCG Vaccine for Tuberculosis (TB):\nVaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB.\nBCG vaccine is given into the skin of the right shoulder area.\nTiming: mainly given to infants and young children.\nNormal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB.\nAbnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients.\nCall Your Doctor If:\nBlister turns into a large red lump\nLymph node in the armpit becomes large\nRemember! Contact your doctor if you or your child develop any \"Contact Your Doctor\" symptoms.\nDisclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.\nLast Reviewed: 05\/01\/2025\nLast Revised: 03\/05\/2025\nCopyright 2000-2025 Schmitt Pediatric Guidelines LLC.","attrs_markdown":"[Skip to navigation menu](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/#nav) [Skip to content](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/#main-content)\n\n- [MyChart](https:\/\/www.seattlechildrens.org\/patients-families\/mychart\/ \"MyChart\")\n- [Telemedicine](https:\/\/www.seattlechildrens.org\/clinics\/telemedicine\/ \"Telemedicine\")\n- [Healthcare Professionals](https:\/\/www.seattlechildrens.org\/healthcare-professionals\/ \"Healthcare Professionals\")\n- [Careers](https:\/\/www.seattlechildrens.org\/careers\/ \"Careers\")\n- [Alerts](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/#sitewide-alerts \"Alerts\")\n- [Donate Now](https:\/\/give.seattlechildrens.org\/give\/284150\/#!\/donation\/checkout?c_src=dotorg&c_src2=global-donate-button \"Donate Now\")\n\n- [I want to …](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/)\n  - - [Go to MyChart](https:\/\/mychart.seattlechildrens.org\/mychart\/authentication\/login)\n    - [Find a Doctor](https:\/\/www.seattlechildrens.org\/directory\/)\n    - [Make an Appointment](https:\/\/www.seattlechildrens.org\/clinics\/schedule-appointment\/)\n    - [Find a Location](https:\/\/www.seattlechildrens.org\/locations\/)\n    - [Visit ED or Urgent Care](https:\/\/www.seattlechildrens.org\/clinics\/urgent-care-clinic\/emergency-or-urgent-care\/)\n  - - [Get Driving Directions](https:\/\/www.seattlechildrens.org\/locations\/)\n    - [Refill a Prescription](https:\/\/www.seattlechildrens.org\/clinics\/pharmacy\/)\n    - [Contact Children's](https:\/\/www.seattlechildrens.org\/contact\/)\n    - [Pay My Bill](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/pay-my-bill\/)\n    - [Estimate My Cost](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/price-transparency\/)\n    - [Apply for Financial Assistance](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/financial-assistance\/)\n    - [Request My Medical Records](https:\/\/www.seattlechildrens.org\/clinics\/health-info-management\/)\n    - [Find Patient Education](https:\/\/www.seattlechildrens.org\/patients-families\/patient-education\/)\n    - [Volunteer](https:\/\/www.seattlechildrens.org\/giving\/volunteer\/ \"Volunteer\")\n    - [Donate](https:\/\/give.seattlechildrens.org\/give\/284150\/#!\/donation\/checkout \"Donate\")\n  - - [Refer and Manage a Patient](https:\/\/www.seattlechildrens.org\/healthcare-professionals\/refer\/)\n\n[Search](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/#nav)\n\n- [Your Visit](https:\/\/www.seattlechildrens.org\/patients-families\/)\n- [Conditions](https:\/\/www.seattlechildrens.org\/conditions\/)\n- [Clinics](https:\/\/www.seattlechildrens.org\/clinics\/)\n- [Research](https:\/\/www.seattlechildrens.org\/research\/)\n- [Health & Safety](https:\/\/www.seattlechildrens.org\/health-safety\/)\n- [Giving](https:\/\/www.seattlechildrens.org\/giving\/)\n- [Press Room](https:\/\/www.seattlechildrens.org\/media\/)\n\nMenu\n\n- [I want to …](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/immunization-reactions\/)\n  - - [Go to MyChart](https:\/\/mychart.seattlechildrens.org\/mychart\/authentication\/login)\n    - [Find a Doctor](https:\/\/www.seattlechildrens.org\/directory\/)\n    - [Make an Appointment](https:\/\/www.seattlechildrens.org\/clinics\/schedule-appointment\/)\n    - [Find a Location](https:\/\/www.seattlechildrens.org\/locations\/)\n    - [Visit ED or Urgent Care](https:\/\/www.seattlechildrens.org\/clinics\/urgent-care-clinic\/emergency-or-urgent-care\/)\n  - - [Get Driving Directions](https:\/\/www.seattlechildrens.org\/locations\/)\n    - [Refill a Prescription](https:\/\/www.seattlechildrens.org\/clinics\/pharmacy\/)\n    - [Contact Children's](https:\/\/www.seattlechildrens.org\/contact\/)\n    - [Pay My Bill](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/pay-my-bill\/)\n    - [Estimate My Cost](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/price-transparency\/)\n    - [Apply for Financial Assistance](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/financial-assistance\/)\n    - [Request My Medical Records](https:\/\/www.seattlechildrens.org\/clinics\/health-info-management\/)\n    - [Find Patient Education](https:\/\/www.seattlechildrens.org\/patients-families\/patient-education\/)\n    - [Volunteer](https:\/\/www.seattlechildrens.org\/giving\/volunteer\/ \"Volunteer\")\n    - [Donate](https:\/\/give.seattlechildrens.org\/give\/284150\/#!\/donation\/checkout \"Donate\")\n  - - [Refer and Manage a Patient](https:\/\/www.seattlechildrens.org\/healthcare-professionals\/refer\/)\n\n[Donate Now](https:\/\/give.seattlechildrens.org\/give\/284150\/#!\/donation\/checkout?c_src=dotorg&c_src2=global-donate-button \"Donate Now\")\n\n- Main Menu\n- On This Page\n  Jump to a section on this page:\n\n- [Conditions](https:\/\/www.seattlechildrens.org\/conditions\/)\n- [All Conditions (A to Z)](https:\/\/www.seattlechildrens.org\/conditions\/a-z\/)\n\n[![A banner that reads \"Parent trusted since 1907; What are good rules for screen time?; We got you; Seattle Children's](https:\/\/www.seattlechildrens.org\/globalassets\/images\/banners\/large-sc_fy26_healthsafety_728x90_0326.png)](https:\/\/www.seattlechildrens.org\/health-safety\/)\n\n# Immunization Reactions\n## Is this your child's symptom?\n- Reactions to a recent immunization (vaccine)\n- Most are reactions at the shot site (such as pain, swelling, redness)\n- General reactions (such as a fever or being fussy) may also occur\n### Reactions to These Vaccines are Covered:\n- Chickenpox (varicella) virus\n- COVID-19 virus\n- DTaP (Diphtheria, Tetanus, Pertussis)\n- Hemophilus influenzae type b\n- Hepatitis A virus\n- Hepatitis B virus\n- Human Papilloma virus\n- Influenza virus\n- MMR (Measles, Mumps, Rubella)\n- Meningococcal\n- Polio virus\n- Pneumococcal\n- Rotavirus\n- Tuberculosis (BCG vaccine)\n### Symptoms of Vaccine Reactions\n- **Local Reactions.** Shot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days.\n- **Fever** with most vaccines begins within 24 hours and lasts 1 to 2 days.\n- **Delayed Reactions.** With the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks.\n- **Anaphylaxis.** Severe allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions.\n### Vaccine Free App\n- Vaccines on the Go app from Children's Hospital of Philadelphia\n- This free app can answer any vaccine questions you may have\n- It is fact-based and up-to-date\n## When to Call for Immunization Reactions\n### Call 911 Now\n- Trouble breathing or swallowing\n- Not moving or very weak\n- Can't wake up\n- You think your child has a life-threatening emergency\n### Call Doctor or Seek Care Now\n- Fever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen.\n- Fever higher than 104° F (40° C)\n- Fever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids)\n- Crying nonstop lasts more than 3 hours\n- Rotavirus vaccine followed by vomiting or severe crying\n- Your child looks or acts very sick\n- You think your child needs to be seen, and the problem is urgent\n### Contact Doctor Within 24 Hours\n- Redness around the shot becomes larger and more painful to touch after 3 days\n- Fever lasts more than 3 days\n- Fever returns after being gone more than 24 hours\n- Measles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days\n- You think your child needs to be seen, but the problem is not urgent\n### Contact Doctor During Office Hours\n- Redness or red streak around shot is larger than 2 inches (5 cm)\n- Redness, swelling or pain is getting worse after 3 days\n- Fussiness from vaccine lasts more than 3 days\n- You have other questions or concerns\n### Self Care at Home\n- Normal immunization reaction (mild redness and swelling, fever)\n\n## Seattle Children's Urgent Care Locations\n**If your child’s illness or injury is life-threatening, call 911.**\n\n- [Bellevue](https:\/\/www.seattlechildrens.org\/locations\/urgent-care-bellevue\/ \"Bellevue\")\n- [Everett](https:\/\/www.seattlechildrens.org\/locations\/urgent-care-everett\/ \"Everett\")\n- [Federal Way](https:\/\/www.seattlechildrens.org\/locations\/urgent-care-federal-way\/ \"Federal Way\")\n- [Seattle](https:\/\/www.seattlechildrens.org\/locations\/urgent-care-seattle\/ \"Seattle\")\n- [Virtual Urgent Care](https:\/\/www.seattlechildrens.org\/clinics\/urgent-care-clinic\/virtual-urgent-care\/ \"Virtual Urgent Care\")\n## Care Advice for Immunization Reactions\n## Treatment for Common Immunization Reactions\n#### What You Should Know About Common Shot Reactions:\n- Immunizations (vaccines) protect your child against serious diseases.\n- Pain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal.\n- All of these reactions mean the vaccine is working.\n- Your child's body is making new antibodies to protect against the real disease.\n- Most of these symptoms will only last 2 or 3 days.\n- There is no need to see your doctor for normal reactions, such as redness or fever.\n- Here is some care advice that should help.\n#### Vaccine Site Reaction: Treatment\n- Some pain, swelling and skin redness at the injection site is **normal.** It means the vaccine is working.\n- **Massage:** gently massage the injection site 3 or more times a day.\n- **Heat:** for pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice.\n- **No Pain Medicine:** try not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen.\n- **Hives at the Shot Site:** if itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed.\n#### Fever with Vaccines: Treatment\n- Fever with vaccines is **normal**, harmless and probably helpful. Reason: fever speeds up your body's immune system.\n- Fever with most vaccines begins within 12 hours and lasts 1 to 2 days.\n- For low grade fevers of 100-102\\&deg F (37.8 to 39\\&deg C), do not give fever medicines. Reason: they may reduce your body's normal immune response.\n- For fevers higher than 102° F (39° C), medicine may be given for discomfort. If needed, use acetaminophen.\n- Fluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk.\n- Clothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops.\n#### General Symptoms from Vaccines:\n- All vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site.\n- Some children sleep more than usual. A decreased appetite and activity level are also common.\n- These symptoms are normal. They do not need any treatment.\n- They will usually go away in 24-48 hours.\n#### Call Your Doctor If:\n- Redness becomes larger than 2 inches (5 cm)\n- Redness becomes more painful after 3 days\n- Fever starts after 2 days (or lasts more than 3 days)\n- Redness or pain lasts more than 7 days\n- You think your child needs to be seen\n- Your child becomes worse\n## Specific Immunization Reactions\n#### Chickenpox Vaccine:\n- Pain or swelling at the shot site for 1 to 2 days. (20% of children)\n- Mild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C).\n- Never give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease.\n- Chickenpox-like rash (usually 2 red bumps) at the shot site (3%)\n- Chickenpox-like rash (usually 5 red bumps) scattered over the body (4%)\n- This mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days.\n- Children with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others.\n- Exception: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox.\n- Caution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage.\n#### COVID-19 Vaccine\n- **Injection site reactions.** Pain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days.\n- **General body symptoms after the second dose.** Fever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep.\n- General symptoms start at about 24 hours. They usually last 1 day, sometimes 2.\n- Vaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine.\n- Vaccines with one dose. Side effects were the same type, but a little less often.\n- Booster shots. Side effects much the same.\n- The vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath.\n- It is impossible to get COVID-19 from the vaccine. Reason: there is no live COVID-19 virus in the vaccine.\n- Severe allergic reactions to the vaccine are very rare.\n#### Diphtheria, Tetanus, Pertussis (DTaP) Vaccine:\n- The following harmless reactions to DTaP can occur:\n- Pain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days.\n- Fever (in 25% of children) and lasts for 24 to 48 hours\n- Mild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours.\n- Large swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally.\n- The large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%).\n- This is not an allergy. Future DTaP vaccines are safe to give.\n#### Hemophilus Influenza Type B Vaccine (Hib):\n- No serious reactions reported.\n- Sore injection site or mild fever only occurs in 2% of children.\n#### Hepatitis A Vaccine:\n- No serious reactions reported.\n- Sore injection occurs in 20% of children.\n- Loss of appetite occurs in 10% of children.\n- Headache occurs in 5% of children.\n- Most often, no fever is present.\n- If these symptoms occur, they most often last 1-2 days.\n#### Hepatitis B Virus Vaccine (HBV):\n- No serious reactions reported.\n- Sore shot site occurs in 30% of children and mild fever in 3% of children.\n- Fever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined.\n#### Influenza Virus Vaccine:\n- Pain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children.\n- Mild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children.\n- **Nasal Influenza Vaccine:** congested or runny nose, mild fever.\n#### Measles, Mumps and Rubella Vaccine (MMR):\n- This shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot.\n- Mild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days.\n- The mild pink rash is mainly on the trunk and lasts 2 or 3 days.\n- No treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash.\n- **Call Your Doctor If:**\n  - Rash changes to blood-colored spots\n  - Rash lasts more than 3 days\n#### Meningococcal Vaccine:\n- No serious reactions.\n- Sore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children.\n- Mild fever occurs in 5%, headache in 40% and joint pain in 20%\n- The vaccine never causes meningitis.\n#### Papillomavirus Vaccine:\n- No serious reactions.\n- Sore injection site for few days in 90%.\n- Mild redness and swelling at the shot site (in 50%).\n- Fever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%.\n- Headache in 30%.\n#### Pneumococcal Vaccine:\n- No serious reactions.\n- Pain, tenderness, swelling or redness at the injection site in 20%.\n- Mild fever less than 102° F (39° C) in 15% for 1-2 days.\n#### Polio Vaccine:\n- Polio vaccine given by shot sometimes causes some muscle soreness.\n- Polio vaccine given by mouth is no longer used in the U.S.\n#### Rotavirus Vaccine:\n- Most often, no serious reactions to this vaccine given by mouth.\n- Mild diarrhea or vomiting for 1 to 2 days in 3%.\n- No fever.\n- Rare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying.\n#### BCG Vaccine for Tuberculosis (TB):\n- Vaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB.\n- BCG vaccine is given into the skin of the right shoulder area.\n- Timing: mainly given to infants and young children.\n- Normal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB.\n- Abnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients.\n- **Call Your Doctor If:**\n  - Blister turns into a large red lump\n  - Lymph node in the armpit becomes large\n\nLast Reviewed: 05\/01\/2025\n\nLast Revised: 03\/05\/2025\n\nCopyright 2000-2025 Schmitt Pediatric Guidelines LLC.\n\n### Should your child see a doctor?\nFind out by selecting your child's symptom or health condition in the list below:\n\nSelect a Symptom\n\n[All Symptoms](https:\/\/www.seattlechildrens.org\/conditions\/symptom-index\/)\n\nAbout Us\n\n- [About Seattle Children’s](https:\/\/www.seattlechildrens.org\/about\/ \"About Seattle Children’s\")\n- [Contact Us](https:\/\/www.seattlechildrens.org\/contact\/ \"Contact Us\")\n- [Locations](https:\/\/www.seattlechildrens.org\/locations\/ \"Locations\")\n- [Visiting Seattle Children’s](https:\/\/www.seattlechildrens.org\/patients-families\/ \"Visiting Seattle Children’s\")\n- [Press Releases](https:\/\/www.seattlechildrens.org\/media\/press-releases\/ \"Press Releases\")\n- [Price Transparency](https:\/\/www.seattlechildrens.org\/clinics\/paying-for-care\/price-transparency\/ \"Price Transparency\")\n\nCommunity\n\n- [Healthcare Professionals](https:\/\/www.seattlechildrens.org\/healthcare-professionals\/ \"Healthcare Professionals\")\n- [Events](https:\/\/www.seattlechildrens.org\/events\/ \"Events\")\n- [Classes](https:\/\/www.seattlechildrens.org\/health-safety\/classes-events\/ \"Classes\")\n- [Volunteering](https:\/\/www.seattlechildrens.org\/giving\/volunteer\/ \"Volunteering\")\n\nExperience and Outcomes\n\n- [Advancing Healthcare Experience and Outcomes](https:\/\/www.seattlechildrens.org\/about\/healthcare-experience-outcomes\/ \"Advancing Healthcare Experience and Outcomes\")\n- [Values](https:\/\/www.seattlechildrens.org\/about\/mission-vision-values\/ \"Values\")\n- [Nondiscrimination and Interpreters Notice](https:\/\/www.seattlechildrens.org\/patients-families\/nondiscrimination-interpreters-notice\/ \"Nondiscrimination and Interpreters Notice\")\n- [Accessibility and Special Needs](https:\/\/www.seattlechildrens.org\/locations\/hospital-campus\/accessibility\/ \"Accessibility and Special Needs\")\n\nAbout This Site\n\n- [About This Website](https:\/\/www.seattlechildrens.org\/about-this-site\/ \"About This Website\")\n- [Feedback](https:\/\/www.seattlechildrens.org\/about-this-site\/web-site-feedback\/ \"Feedback\")\n- [Terms of Use](https:\/\/www.seattlechildrens.org\/about-this-site\/terms-of-use\/ \"Website Terms of Use\")\n- [Privacy](https:\/\/www.seattlechildrens.org\/about-this-site\/website-privacy\/ \"Privacy\")\n- [My Health My Data](https:\/\/www.seattlechildrens.org\/about-this-site\/my-health-my-data\/ \"My Health My Data\")\n- [Notice of Privacy Practices](https:\/\/www.seattlechildrens.org\/about-this-site\/notice-of-privacy-practices\/ \"Notice of Privacy Practices\")\n- [Employees](https:\/\/www.seattlechildrens.org\/employees\/ \"Employees\")\n- [Working From Home and Remote Access Help](https:\/\/www.seattlechildrens.org\/remoteaccesshelp\/ \"Working From Home and Remote Access Help\")\n- [Vendors](https:\/\/login.ghx.com\/identity-service\/login \"Vendors\")\n\n©2026 Seattle Children’s Hospital\n\n4800 Sand Point Way NE, Seattle, WA 98105\n\n[206-987-2000](tel:+1-206-987-2000 \"Telephone\") [866-987-2000 (toll-free)](tel:+1-866-987-2000 \"Telephone\") [206-987-0391 (TTY)](tel:+1-206-987-0391 \"Telephone\")\n\n[![U.S. News & World Report Best Children's Hospitals Honor Roll Badge](https:\/\/www.seattlechildrens.org\/globalassets\/images\/__global-icons--images\/best-childrens-hospitals-honor-roll.png)](https:\/\/health.usnews.com\/best-hospitals\/area\/wa\/seattle-childrens-hospital-6910560 \"Ranked in 10 Specialties by U.S. News & World Report\")   [![Forbes America's Best Large Employers](https:\/\/www.seattlechildrens.org\/globalassets\/images\/logos-and-badges\/forbes-able-logo.png)](https:\/\/www.forbes.com\/lists\/best-large-employers\/ \"Forbes America's Best Large Employers 2026\")   [![Magnet Recognized Nursing Program](https:\/\/www.seattlechildrens.org\/globalassets\/images\/logos-and-badges\/ancc-magnet.png)](https:\/\/www.nursingworld.org\/magnet\/ \"Magnet Recognized Nursing Program\")   [![Children's Miracle Network Hospitals](https:\/\/www.seattlechildrens.org\/globalassets\/images\/logos-and-badges\/childrens-miracle-network-hospitals-logo.png)](https:\/\/www.seattlechildrens.org\/giving\/business\/miracle-network\/ \"Children's Miracle Network Hospitals\")\n\nSeattle Children’s complies with applicable federal and other civil rights laws and does not discriminate, exclude people or treat them differently based on race, color, religion (creed), sex, gender identity or expression, sexual orientation, national origin (ancestry), age, disability, or any other status protected by applicable federal, state or local law. Financial assistance for medically necessary services is based on family income and hospital resources and is provided to children under age 21 whose primary residence is in Washington, Alaska, Montana or Idaho.","attrs_readable_markdown":"## Is this your child's symptom?\n- Reactions to a recent immunization (vaccine)\n- Most are reactions at the shot site (such as pain, swelling, redness)\n- General reactions (such as a fever or being fussy) may also occur\n### Reactions to These Vaccines are Covered:\n- Chickenpox (varicella) virus\n- COVID-19 virus\n- DTaP (Diphtheria, Tetanus, Pertussis)\n- Hemophilus influenzae type b\n- Hepatitis A virus\n- Hepatitis B virus\n- Human Papilloma virus\n- Influenza virus\n- MMR (Measles, Mumps, Rubella)\n- Meningococcal\n- Polio virus\n- Pneumococcal\n- Rotavirus\n- Tuberculosis (BCG vaccine)\n### Symptoms of Vaccine Reactions\n- **Local Reactions.** Shot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days.\n- **Fever** with most vaccines begins within 24 hours and lasts 1 to 2 days.\n- **Delayed Reactions.** With the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks.\n- **Anaphylaxis.** Severe allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions.\n### Vaccine Free App\n- Vaccines on the Go app from Children's Hospital of Philadelphia\n- This free app can answer any vaccine questions you may have\n- It is fact-based and up-to-date\n## When to Call for Immunization Reactions\n### Call 911 Now\n- Trouble breathing or swallowing\n- Not moving or very weak\n- Can't wake up\n- You think your child has a life-threatening emergency\n### Call Doctor or Seek Care Now\n- Fever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen.\n- Fever higher than 104° F (40° C)\n- Fever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids)\n- Crying nonstop lasts more than 3 hours\n- Rotavirus vaccine followed by vomiting or severe crying\n- Your child looks or acts very sick\n- You think your child needs to be seen, and the problem is urgent\n### Contact Doctor Within 24 Hours\n- Redness around the shot becomes larger and more painful to touch after 3 days\n- Fever lasts more than 3 days\n- Fever returns after being gone more than 24 hours\n- Measles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days\n- You think your child needs to be seen, but the problem is not urgent\n### Contact Doctor During Office Hours\n- Redness or red streak around shot is larger than 2 inches (5 cm)\n- Redness, swelling or pain is getting worse after 3 days\n- Fussiness from vaccine lasts more than 3 days\n- You have other questions or concerns\n### Self Care at Home\n- Normal immunization reaction (mild redness and swelling, fever)\n## Care Advice for Immunization Reactions\n## Treatment for Common Immunization Reactions\n#### What You Should Know About Common Shot Reactions:\n- Immunizations (vaccines) protect your child against serious diseases.\n- Pain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal.\n- All of these reactions mean the vaccine is working.\n- Your child's body is making new antibodies to protect against the real disease.\n- Most of these symptoms will only last 2 or 3 days.\n- There is no need to see your doctor for normal reactions, such as redness or fever.\n- Here is some care advice that should help.\n#### Vaccine Site Reaction: Treatment\n- Some pain, swelling and skin redness at the injection site is **normal.** It means the vaccine is working.\n- **Massage:** gently massage the injection site 3 or more times a day.\n- **Heat:** for pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice.\n- **No Pain Medicine:** try not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen.\n- **Hives at the Shot Site:** if itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed.\n#### Fever with Vaccines: Treatment\n- Fever with vaccines is **normal**, harmless and probably helpful. Reason: fever speeds up your body's immune system.\n- Fever with most vaccines begins within 12 hours and lasts 1 to 2 days.\n- For low grade fevers of 100-102\\&deg F (37.8 to 39\\&deg C), do not give fever medicines. Reason: they may reduce your body's normal immune response.\n- For fevers higher than 102° F (39° C), medicine may be given for discomfort. If needed, use acetaminophen.\n- Fluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk.\n- Clothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops.\n#### General Symptoms from Vaccines:\n- All vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site.\n- Some children sleep more than usual. A decreased appetite and activity level are also common.\n- These symptoms are normal. They do not need any treatment.\n- They will usually go away in 24-48 hours.\n#### Call Your Doctor If:\n- Redness becomes larger than 2 inches (5 cm)\n- Redness becomes more painful after 3 days\n- Fever starts after 2 days (or lasts more than 3 days)\n- Redness or pain lasts more than 7 days\n- You think your child needs to be seen\n- Your child becomes worse\n## Specific Immunization Reactions\n#### Chickenpox Vaccine:\n- Pain or swelling at the shot site for 1 to 2 days. (20% of children)\n- Mild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C).\n- Never give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease.\n- Chickenpox-like rash (usually 2 red bumps) at the shot site (3%)\n- Chickenpox-like rash (usually 5 red bumps) scattered over the body (4%)\n- This mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days.\n- Children with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others.\n- Exception: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox.\n- Caution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage.\n#### COVID-19 Vaccine\n- **Injection site reactions.** Pain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days.\n- **General body symptoms after the second dose.** Fever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep.\n- General symptoms start at about 24 hours. They usually last 1 day, sometimes 2.\n- Vaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine.\n- Vaccines with one dose. Side effects were the same type, but a little less often.\n- Booster shots. Side effects much the same.\n- The vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath.\n- It is impossible to get COVID-19 from the vaccine. Reason: there is no live COVID-19 virus in the vaccine.\n- Severe allergic reactions to the vaccine are very rare.\n#### Diphtheria, Tetanus, Pertussis (DTaP) Vaccine:\n- The following harmless reactions to DTaP can occur:\n- Pain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days.\n- Fever (in 25% of children) and lasts for 24 to 48 hours\n- Mild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours.\n- Large swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally.\n- The large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%).\n- This is not an allergy. Future DTaP vaccines are safe to give.\n#### Hemophilus Influenza Type B Vaccine (Hib):\n- No serious reactions reported.\n- Sore injection site or mild fever only occurs in 2% of children.\n#### Hepatitis A Vaccine:\n- No serious reactions reported.\n- Sore injection occurs in 20% of children.\n- Loss of appetite occurs in 10% of children.\n- Headache occurs in 5% of children.\n- Most often, no fever is present.\n- If these symptoms occur, they most often last 1-2 days.\n#### Hepatitis B Virus Vaccine (HBV):\n- No serious reactions reported.\n- Sore shot site occurs in 30% of children and mild fever in 3% of children.\n- Fever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined.\n#### Influenza Virus Vaccine:\n- Pain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children.\n- Mild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children.\n- **Nasal Influenza Vaccine:** congested or runny nose, mild fever.\n#### Measles, Mumps and Rubella Vaccine (MMR):\n- This shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot.\n- Mild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days.\n- The mild pink rash is mainly on the trunk and lasts 2 or 3 days.\n- No treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash.\n- **Call Your Doctor If:**\n  - Rash changes to blood-colored spots\n  - Rash lasts more than 3 days\n#### Meningococcal Vaccine:\n- No serious reactions.\n- Sore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children.\n- Mild fever occurs in 5%, headache in 40% and joint pain in 20%\n- The vaccine never causes meningitis.\n#### Papillomavirus Vaccine:\n- No serious reactions.\n- Sore injection site for few days in 90%.\n- Mild redness and swelling at the shot site (in 50%).\n- Fever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%.\n- Headache in 30%.\n#### Pneumococcal Vaccine:\n- No serious reactions.\n- Pain, tenderness, swelling or redness at the injection site in 20%.\n- Mild fever less than 102° F (39° C) in 15% for 1-2 days.\n#### Polio Vaccine:\n- Polio vaccine given by shot sometimes causes some muscle soreness.\n- Polio vaccine given by mouth is no longer used in the U.S.\n#### Rotavirus Vaccine:\n- Most often, no serious reactions to this vaccine given by mouth.\n- Mild diarrhea or vomiting for 1 to 2 days in 3%.\n- No fever.\n- Rare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying.\n#### BCG Vaccine for Tuberculosis (TB):\n- Vaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB.\n- BCG vaccine is given into the skin of the right shoulder area.\n- Timing: mainly given to infants and young children.\n- Normal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB.\n- Abnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients.\n- **Call Your Doctor If:**\n  - Blister turns into a large red lump\n  - Lymph node in the armpit becomes large\n\nLast Reviewed: 05\/01\/2025\n\nLast Revised: 03\/05\/2025\n\nCopyright 2000-2025 Schmitt Pediatric Guidelines LLC.","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

7 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.3 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/
Last Crawled	2026-04-10 00:42:48 (7 days ago)
First Indexed	2018-10-08 00:54:04 (7 years ago)
HTTP Status Code	200
Meta Title	Immunization Reactions
Meta Description	null
Meta Canonical	null
Boilerpipe Text	Is this your child's symptom? Reactions to a recent immunization (vaccine) Most are reactions at the shot site (such as pain, swelling, redness) General reactions (such as a fever or being fussy) may also occur Reactions to These Vaccines are Covered: Chickenpox (varicella) virus COVID-19 virus DTaP (Diphtheria, Tetanus, Pertussis) Hemophilus influenzae type b Hepatitis A virus Hepatitis B virus Human Papilloma virus Influenza virus MMR (Measles, Mumps, Rubella) Meningococcal Polio virus Pneumococcal Rotavirus Tuberculosis (BCG vaccine) Symptoms of Vaccine Reactions Local Reactions. Shot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days. Fever with most vaccines begins within 24 hours and lasts 1 to 2 days. Delayed Reactions. With the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks. Anaphylaxis. Severe allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions. Vaccine Free App Vaccines on the Go app from Children's Hospital of Philadelphia This free app can answer any vaccine questions you may have It is fact-based and up-to-date When to Call for Immunization Reactions Call 911 Now Trouble breathing or swallowing Not moving or very weak Can't wake up You think your child has a life-threatening emergency Call Doctor or Seek Care Now Fever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen. Fever higher than 104° F (40° C) Fever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids) Crying nonstop lasts more than 3 hours Rotavirus vaccine followed by vomiting or severe crying Your child looks or acts very sick You think your child needs to be seen, and the problem is urgent Contact Doctor Within 24 Hours Redness around the shot becomes larger and more painful to touch after 3 days Fever lasts more than 3 days Fever returns after being gone more than 24 hours Measles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days You think your child needs to be seen, but the problem is not urgent Contact Doctor During Office Hours Redness or red streak around shot is larger than 2 inches (5 cm) Redness, swelling or pain is getting worse after 3 days Fussiness from vaccine lasts more than 3 days You have other questions or concerns Self Care at Home Normal immunization reaction (mild redness and swelling, fever) Care Advice for Immunization Reactions Treatment for Common Immunization Reactions What You Should Know About Common Shot Reactions: Immunizations (vaccines) protect your child against serious diseases. Pain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal. All of these reactions mean the vaccine is working. Your child's body is making new antibodies to protect against the real disease. Most of these symptoms will only last 2 or 3 days. There is no need to see your doctor for normal reactions, such as redness or fever. Here is some care advice that should help. Vaccine Site Reaction: Treatment Some pain, swelling and skin redness at the injection site is normal. It means the vaccine is working. Massage: gently massage the injection site 3 or more times a day. Heat: for pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice. No Pain Medicine: try not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen. Hives at the Shot Site: if itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed. Fever with Vaccines: Treatment Fever with vaccines is normal , harmless and probably helpful. Reason: fever speeds up your body's immune system. Fever with most vaccines begins within 12 hours and lasts 1 to 2 days. For low grade fevers of 100-102&deg F (37.8 to 39&deg C), do not give fever medicines. Reason: they may reduce your body's normal immune response. For fevers higher than 102° F (39° C), medicine may be given for discomfort. If needed, use acetaminophen. Fluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk. Clothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops. General Symptoms from Vaccines: All vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site. Some children sleep more than usual. A decreased appetite and activity level are also common. These symptoms are normal. They do not need any treatment. They will usually go away in 24-48 hours. Call Your Doctor If: Redness becomes larger than 2 inches (5 cm) Redness becomes more painful after 3 days Fever starts after 2 days (or lasts more than 3 days) Redness or pain lasts more than 7 days You think your child needs to be seen Your child becomes worse Specific Immunization Reactions Chickenpox Vaccine: Pain or swelling at the shot site for 1 to 2 days. (20% of children) Mild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C). Never give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease. Chickenpox-like rash (usually 2 red bumps) at the shot site (3%) Chickenpox-like rash (usually 5 red bumps) scattered over the body (4%) This mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days. Children with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others. Exception: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox. Caution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage. COVID-19 Vaccine Injection site reactions. Pain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days. General body symptoms after the second dose. Fever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep. General symptoms start at about 24 hours. They usually last 1 day, sometimes 2. Vaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine. Vaccines with one dose. Side effects were the same type, but a little less often. Booster shots. Side effects much the same. The vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath. It is impossible to get COVID-19 from the vaccine. Reason: there is no live COVID-19 virus in the vaccine. Severe allergic reactions to the vaccine are very rare. Diphtheria, Tetanus, Pertussis (DTaP) Vaccine: The following harmless reactions to DTaP can occur: Pain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days. Fever (in 25% of children) and lasts for 24 to 48 hours Mild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours. Large swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally. The large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%). This is not an allergy. Future DTaP vaccines are safe to give. Hemophilus Influenza Type B Vaccine (Hib): No serious reactions reported. Sore injection site or mild fever only occurs in 2% of children. Hepatitis A Vaccine: No serious reactions reported. Sore injection occurs in 20% of children. Loss of appetite occurs in 10% of children. Headache occurs in 5% of children. Most often, no fever is present. If these symptoms occur, they most often last 1-2 days. Hepatitis B Virus Vaccine (HBV): No serious reactions reported. Sore shot site occurs in 30% of children and mild fever in 3% of children. Fever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined. Influenza Virus Vaccine: Pain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children. Mild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children. Nasal Influenza Vaccine: congested or runny nose, mild fever. Measles, Mumps and Rubella Vaccine (MMR): This shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot. Mild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days. The mild pink rash is mainly on the trunk and lasts 2 or 3 days. No treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash. Call Your Doctor If: Rash changes to blood-colored spots Rash lasts more than 3 days Meningococcal Vaccine: No serious reactions. Sore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children. Mild fever occurs in 5%, headache in 40% and joint pain in 20% The vaccine never causes meningitis. Papillomavirus Vaccine: No serious reactions. Sore injection site for few days in 90%. Mild redness and swelling at the shot site (in 50%). Fever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%. Headache in 30%. Pneumococcal Vaccine: No serious reactions. Pain, tenderness, swelling or redness at the injection site in 20%. Mild fever less than 102° F (39° C) in 15% for 1-2 days. Polio Vaccine: Polio vaccine given by shot sometimes causes some muscle soreness. Polio vaccine given by mouth is no longer used in the U.S. Rotavirus Vaccine: Most often, no serious reactions to this vaccine given by mouth. Mild diarrhea or vomiting for 1 to 2 days in 3%. No fever. Rare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying. BCG Vaccine for Tuberculosis (TB): Vaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB. BCG vaccine is given into the skin of the right shoulder area. Timing: mainly given to infants and young children. Normal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB. Abnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients. Call Your Doctor If: Blister turns into a large red lump Lymph node in the armpit becomes large Remember! Contact your doctor if you or your child develop any "Contact Your Doctor" symptoms. Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it. Last Reviewed: 05/01/2025 Last Revised: 03/05/2025 Copyright 2000-2025 Schmitt Pediatric Guidelines LLC.
Markdown	[Skip to navigation menu](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/#nav) [Skip to content](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/#main-content) - [MyChart](https://www.seattlechildrens.org/patients-families/mychart/ "MyChart") - [Telemedicine](https://www.seattlechildrens.org/clinics/telemedicine/ "Telemedicine") - [Healthcare Professionals](https://www.seattlechildrens.org/healthcare-professionals/ "Healthcare Professionals") - [Careers](https://www.seattlechildrens.org/careers/ "Careers") - [Alerts](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/#sitewide-alerts "Alerts") - [Donate Now](https://give.seattlechildrens.org/give/284150/#!/donation/checkout?c_src=dotorg&c_src2=global-donate-button "Donate Now") - [I want to …](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/) - - [Go to MyChart](https://mychart.seattlechildrens.org/mychart/authentication/login) - [Find a Doctor](https://www.seattlechildrens.org/directory/) - [Make an Appointment](https://www.seattlechildrens.org/clinics/schedule-appointment/) - [Find a Location](https://www.seattlechildrens.org/locations/) - [Visit ED or Urgent Care](https://www.seattlechildrens.org/clinics/urgent-care-clinic/emergency-or-urgent-care/) - - [Get Driving Directions](https://www.seattlechildrens.org/locations/) - [Refill a Prescription](https://www.seattlechildrens.org/clinics/pharmacy/) - [Contact Children's](https://www.seattlechildrens.org/contact/) - [Pay My Bill](https://www.seattlechildrens.org/clinics/paying-for-care/pay-my-bill/) - [Estimate My Cost](https://www.seattlechildrens.org/clinics/paying-for-care/price-transparency/) - [Apply for Financial Assistance](https://www.seattlechildrens.org/clinics/paying-for-care/financial-assistance/) - [Request My Medical Records](https://www.seattlechildrens.org/clinics/health-info-management/) - [Find Patient Education](https://www.seattlechildrens.org/patients-families/patient-education/) - [Volunteer](https://www.seattlechildrens.org/giving/volunteer/ "Volunteer") - [Donate](https://give.seattlechildrens.org/give/284150/#!/donation/checkout "Donate") - - [Refer and Manage a Patient](https://www.seattlechildrens.org/healthcare-professionals/refer/) [Search](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/#nav) - [Your Visit](https://www.seattlechildrens.org/patients-families/) - [Conditions](https://www.seattlechildrens.org/conditions/) - [Clinics](https://www.seattlechildrens.org/clinics/) - [Research](https://www.seattlechildrens.org/research/) - [Health & Safety](https://www.seattlechildrens.org/health-safety/) - [Giving](https://www.seattlechildrens.org/giving/) - [Press Room](https://www.seattlechildrens.org/media/) Menu - [I want to …](https://www.seattlechildrens.org/conditions/a-z/immunization-reactions/) - - [Go to MyChart](https://mychart.seattlechildrens.org/mychart/authentication/login) - [Find a Doctor](https://www.seattlechildrens.org/directory/) - [Make an Appointment](https://www.seattlechildrens.org/clinics/schedule-appointment/) - [Find a Location](https://www.seattlechildrens.org/locations/) - [Visit ED or Urgent Care](https://www.seattlechildrens.org/clinics/urgent-care-clinic/emergency-or-urgent-care/) - - [Get Driving Directions](https://www.seattlechildrens.org/locations/) - [Refill a Prescription](https://www.seattlechildrens.org/clinics/pharmacy/) - [Contact Children's](https://www.seattlechildrens.org/contact/) - [Pay My Bill](https://www.seattlechildrens.org/clinics/paying-for-care/pay-my-bill/) - [Estimate My Cost](https://www.seattlechildrens.org/clinics/paying-for-care/price-transparency/) - [Apply for Financial Assistance](https://www.seattlechildrens.org/clinics/paying-for-care/financial-assistance/) - [Request My Medical Records](https://www.seattlechildrens.org/clinics/health-info-management/) - [Find Patient Education](https://www.seattlechildrens.org/patients-families/patient-education/) - [Volunteer](https://www.seattlechildrens.org/giving/volunteer/ "Volunteer") - [Donate](https://give.seattlechildrens.org/give/284150/#!/donation/checkout "Donate") - - [Refer and Manage a Patient](https://www.seattlechildrens.org/healthcare-professionals/refer/) [Donate Now](https://give.seattlechildrens.org/give/284150/#!/donation/checkout?c_src=dotorg&c_src2=global-donate-button "Donate Now") - Main Menu - On This Page Jump to a section on this page: - [Conditions](https://www.seattlechildrens.org/conditions/) - [All Conditions (A to Z)](https://www.seattlechildrens.org/conditions/a-z/) [![A banner that reads "Parent trusted since 1907; What are good rules for screen time?; We got you; Seattle Children's](https://www.seattlechildrens.org/globalassets/images/banners/large-sc_fy26_healthsafety_728x90_0326.png)](https://www.seattlechildrens.org/health-safety/) # Immunization Reactions ## Is this your child's symptom? - Reactions to a recent immunization (vaccine) - Most are reactions at the shot site (such as pain, swelling, redness) - General reactions (such as a fever or being fussy) may also occur ### Reactions to These Vaccines are Covered: - Chickenpox (varicella) virus - COVID-19 virus - DTaP (Diphtheria, Tetanus, Pertussis) - Hemophilus influenzae type b - Hepatitis A virus - Hepatitis B virus - Human Papilloma virus - Influenza virus - MMR (Measles, Mumps, Rubella) - Meningococcal - Polio virus - Pneumococcal - Rotavirus - Tuberculosis (BCG vaccine) ### Symptoms of Vaccine Reactions - Local Reactions. Shot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days. - Fever with most vaccines begins within 24 hours and lasts 1 to 2 days. - Delayed Reactions. With the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks. - Anaphylaxis. Severe allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions. ### Vaccine Free App - Vaccines on the Go app from Children's Hospital of Philadelphia - This free app can answer any vaccine questions you may have - It is fact-based and up-to-date ## When to Call for Immunization Reactions ### Call 911 Now - Trouble breathing or swallowing - Not moving or very weak - Can't wake up - You think your child has a life-threatening emergency ### Call Doctor or Seek Care Now - Fever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen. - Fever higher than 104° F (40° C) - Fever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids) - Crying nonstop lasts more than 3 hours - Rotavirus vaccine followed by vomiting or severe crying - Your child looks or acts very sick - You think your child needs to be seen, and the problem is urgent ### Contact Doctor Within 24 Hours - Redness around the shot becomes larger and more painful to touch after 3 days - Fever lasts more than 3 days - Fever returns after being gone more than 24 hours - Measles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days - You think your child needs to be seen, but the problem is not urgent ### Contact Doctor During Office Hours - Redness or red streak around shot is larger than 2 inches (5 cm) - Redness, swelling or pain is getting worse after 3 days - Fussiness from vaccine lasts more than 3 days - You have other questions or concerns ### Self Care at Home - Normal immunization reaction (mild redness and swelling, fever) ## Seattle Children's Urgent Care Locations If your child’s illness or injury is life-threatening, call 911. - [Bellevue](https://www.seattlechildrens.org/locations/urgent-care-bellevue/ "Bellevue") - [Everett](https://www.seattlechildrens.org/locations/urgent-care-everett/ "Everett") - [Federal Way](https://www.seattlechildrens.org/locations/urgent-care-federal-way/ "Federal Way") - [Seattle](https://www.seattlechildrens.org/locations/urgent-care-seattle/ "Seattle") - [Virtual Urgent Care](https://www.seattlechildrens.org/clinics/urgent-care-clinic/virtual-urgent-care/ "Virtual Urgent Care") ## Care Advice for Immunization Reactions ## Treatment for Common Immunization Reactions #### What You Should Know About Common Shot Reactions: - Immunizations (vaccines) protect your child against serious diseases. - Pain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal. - All of these reactions mean the vaccine is working. - Your child's body is making new antibodies to protect against the real disease. - Most of these symptoms will only last 2 or 3 days. - There is no need to see your doctor for normal reactions, such as redness or fever. - Here is some care advice that should help. #### Vaccine Site Reaction: Treatment - Some pain, swelling and skin redness at the injection site is normal. It means the vaccine is working. - Massage: gently massage the injection site 3 or more times a day. - Heat: for pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice. - No Pain Medicine: try not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen. - Hives at the Shot Site: if itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed. #### Fever with Vaccines: Treatment - Fever with vaccines is normal, harmless and probably helpful. Reason: fever speeds up your body's immune system. - Fever with most vaccines begins within 12 hours and lasts 1 to 2 days. - For low grade fevers of 100-102\&deg F (37.8 to 39\&deg C), do not give fever medicines. Reason: they may reduce your body's normal immune response. - For fevers higher than 102° F (39° C), medicine may be given for discomfort. If needed, use acetaminophen. - Fluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk. - Clothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops. #### General Symptoms from Vaccines: - All vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site. - Some children sleep more than usual. A decreased appetite and activity level are also common. - These symptoms are normal. They do not need any treatment. - They will usually go away in 24-48 hours. #### Call Your Doctor If: - Redness becomes larger than 2 inches (5 cm) - Redness becomes more painful after 3 days - Fever starts after 2 days (or lasts more than 3 days) - Redness or pain lasts more than 7 days - You think your child needs to be seen - Your child becomes worse ## Specific Immunization Reactions #### Chickenpox Vaccine: - Pain or swelling at the shot site for 1 to 2 days. (20% of children) - Mild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C). - Never give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease. - Chickenpox-like rash (usually 2 red bumps) at the shot site (3%) - Chickenpox-like rash (usually 5 red bumps) scattered over the body (4%) - This mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days. - Children with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others. - Exception: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox. - Caution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage. #### COVID-19 Vaccine - Injection site reactions. Pain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days. - General body symptoms after the second dose. Fever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep. - General symptoms start at about 24 hours. They usually last 1 day, sometimes 2. - Vaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine. - Vaccines with one dose. Side effects were the same type, but a little less often. - Booster shots. Side effects much the same. - The vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath. - It is impossible to get COVID-19 from the vaccine. Reason: there is no live COVID-19 virus in the vaccine. - Severe allergic reactions to the vaccine are very rare. #### Diphtheria, Tetanus, Pertussis (DTaP) Vaccine: - The following harmless reactions to DTaP can occur: - Pain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days. - Fever (in 25% of children) and lasts for 24 to 48 hours - Mild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours. - Large swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally. - The large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%). - This is not an allergy. Future DTaP vaccines are safe to give. #### Hemophilus Influenza Type B Vaccine (Hib): - No serious reactions reported. - Sore injection site or mild fever only occurs in 2% of children. #### Hepatitis A Vaccine: - No serious reactions reported. - Sore injection occurs in 20% of children. - Loss of appetite occurs in 10% of children. - Headache occurs in 5% of children. - Most often, no fever is present. - If these symptoms occur, they most often last 1-2 days. #### Hepatitis B Virus Vaccine (HBV): - No serious reactions reported. - Sore shot site occurs in 30% of children and mild fever in 3% of children. - Fever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined. #### Influenza Virus Vaccine: - Pain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children. - Mild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children. - Nasal Influenza Vaccine: congested or runny nose, mild fever. #### Measles, Mumps and Rubella Vaccine (MMR): - This shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot. - Mild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days. - The mild pink rash is mainly on the trunk and lasts 2 or 3 days. - No treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash. - Call Your Doctor If: - Rash changes to blood-colored spots - Rash lasts more than 3 days #### Meningococcal Vaccine: - No serious reactions. - Sore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children. - Mild fever occurs in 5%, headache in 40% and joint pain in 20% - The vaccine never causes meningitis. #### Papillomavirus Vaccine: - No serious reactions. - Sore injection site for few days in 90%. - Mild redness and swelling at the shot site (in 50%). - Fever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%. - Headache in 30%. #### Pneumococcal Vaccine: - No serious reactions. - Pain, tenderness, swelling or redness at the injection site in 20%. - Mild fever less than 102° F (39° C) in 15% for 1-2 days. #### Polio Vaccine: - Polio vaccine given by shot sometimes causes some muscle soreness. - Polio vaccine given by mouth is no longer used in the U.S. #### Rotavirus Vaccine: - Most often, no serious reactions to this vaccine given by mouth. - Mild diarrhea or vomiting for 1 to 2 days in 3%. - No fever. - Rare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying. #### BCG Vaccine for Tuberculosis (TB): - Vaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB. - BCG vaccine is given into the skin of the right shoulder area. - Timing: mainly given to infants and young children. - Normal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB. - Abnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients. - Call Your Doctor If: - Blister turns into a large red lump - Lymph node in the armpit becomes large Last Reviewed: 05/01/2025 Last Revised: 03/05/2025 Copyright 2000-2025 Schmitt Pediatric Guidelines LLC. ### Should your child see a doctor? Find out by selecting your child's symptom or health condition in the list below: Select a Symptom [All Symptoms](https://www.seattlechildrens.org/conditions/symptom-index/) About Us - [About Seattle Children’s](https://www.seattlechildrens.org/about/ "About Seattle Children’s") - [Contact Us](https://www.seattlechildrens.org/contact/ "Contact Us") - [Locations](https://www.seattlechildrens.org/locations/ "Locations") - [Visiting Seattle Children’s](https://www.seattlechildrens.org/patients-families/ "Visiting Seattle Children’s") - [Press Releases](https://www.seattlechildrens.org/media/press-releases/ "Press Releases") - [Price Transparency](https://www.seattlechildrens.org/clinics/paying-for-care/price-transparency/ "Price Transparency") Community - [Healthcare Professionals](https://www.seattlechildrens.org/healthcare-professionals/ "Healthcare Professionals") - [Events](https://www.seattlechildrens.org/events/ "Events") - [Classes](https://www.seattlechildrens.org/health-safety/classes-events/ "Classes") - [Volunteering](https://www.seattlechildrens.org/giving/volunteer/ "Volunteering") Experience and Outcomes - [Advancing Healthcare Experience and Outcomes](https://www.seattlechildrens.org/about/healthcare-experience-outcomes/ "Advancing Healthcare Experience and Outcomes") - [Values](https://www.seattlechildrens.org/about/mission-vision-values/ "Values") - [Nondiscrimination and Interpreters Notice](https://www.seattlechildrens.org/patients-families/nondiscrimination-interpreters-notice/ "Nondiscrimination and Interpreters Notice") - [Accessibility and Special Needs](https://www.seattlechildrens.org/locations/hospital-campus/accessibility/ "Accessibility and Special Needs") About This Site - [About This Website](https://www.seattlechildrens.org/about-this-site/ "About This Website") - [Feedback](https://www.seattlechildrens.org/about-this-site/web-site-feedback/ "Feedback") - [Terms of Use](https://www.seattlechildrens.org/about-this-site/terms-of-use/ "Website Terms of Use") - [Privacy](https://www.seattlechildrens.org/about-this-site/website-privacy/ "Privacy") - [My Health My Data](https://www.seattlechildrens.org/about-this-site/my-health-my-data/ "My Health My Data") - [Notice of Privacy Practices](https://www.seattlechildrens.org/about-this-site/notice-of-privacy-practices/ "Notice of Privacy Practices") - [Employees](https://www.seattlechildrens.org/employees/ "Employees") - [Working From Home and Remote Access Help](https://www.seattlechildrens.org/remoteaccesshelp/ "Working From Home and Remote Access Help") - [Vendors](https://login.ghx.com/identity-service/login "Vendors") ©2026 Seattle Children’s Hospital 4800 Sand Point Way NE, Seattle, WA 98105 [206-987-2000](tel:+1-206-987-2000 "Telephone") [866-987-2000 (toll-free)](tel:+1-866-987-2000 "Telephone") [206-987-0391 (TTY)](tel:+1-206-987-0391 "Telephone") [![U.S. News & World Report Best Children's Hospitals Honor Roll Badge](https://www.seattlechildrens.org/globalassets/images/__global-icons--images/best-childrens-hospitals-honor-roll.png)](https://health.usnews.com/best-hospitals/area/wa/seattle-childrens-hospital-6910560 "Ranked in 10 Specialties by U.S. News & World Report") [![Forbes America's Best Large Employers](https://www.seattlechildrens.org/globalassets/images/logos-and-badges/forbes-able-logo.png)](https://www.forbes.com/lists/best-large-employers/ "Forbes America's Best Large Employers 2026") [![Magnet Recognized Nursing Program](https://www.seattlechildrens.org/globalassets/images/logos-and-badges/ancc-magnet.png)](https://www.nursingworld.org/magnet/ "Magnet Recognized Nursing Program") [![Children's Miracle Network Hospitals](https://www.seattlechildrens.org/globalassets/images/logos-and-badges/childrens-miracle-network-hospitals-logo.png)](https://www.seattlechildrens.org/giving/business/miracle-network/ "Children's Miracle Network Hospitals") Seattle Children’s complies with applicable federal and other civil rights laws and does not discriminate, exclude people or treat them differently based on race, color, religion (creed), sex, gender identity or expression, sexual orientation, national origin (ancestry), age, disability, or any other status protected by applicable federal, state or local law. Financial assistance for medically necessary services is based on family income and hospital resources and is provided to children under age 21 whose primary residence is in Washington, Alaska, Montana or Idaho.
Readable Markdown	## Is this your child's symptom? - Reactions to a recent immunization (vaccine) - Most are reactions at the shot site (such as pain, swelling, redness) - General reactions (such as a fever or being fussy) may also occur ### Reactions to These Vaccines are Covered: - Chickenpox (varicella) virus - COVID-19 virus - DTaP (Diphtheria, Tetanus, Pertussis) - Hemophilus influenzae type b - Hepatitis A virus - Hepatitis B virus - Human Papilloma virus - Influenza virus - MMR (Measles, Mumps, Rubella) - Meningococcal - Polio virus - Pneumococcal - Rotavirus - Tuberculosis (BCG vaccine) ### Symptoms of Vaccine Reactions - Local Reactions. Shot sites can have swelling, redness and pain. Most often, these symptoms start within 24 hours of the shot. They most often last 3 to 5 days. With the DTaP vaccine, they can last up to 7 days. - Fever with most vaccines begins within 24 hours and lasts 1 to 2 days. - Delayed Reactions. With the MMR and chickenpox shots, fever and rash can occur. These symptoms start later. They usually begin between 1 and 4 weeks. - Anaphylaxis. Severe allergic reactions are very rare. They start within 20 minutes. Sometimes can occur up to 2 hours after the shot. Vaccine health workers know how to treat these reactions. ### Vaccine Free App - Vaccines on the Go app from Children's Hospital of Philadelphia - This free app can answer any vaccine questions you may have - It is fact-based and up-to-date ## When to Call for Immunization Reactions ### Call 911 Now - Trouble breathing or swallowing - Not moving or very weak - Can't wake up - You think your child has a life-threatening emergency ### Call Doctor or Seek Care Now - Fever in baby less than 12 weeks old. Caution: do NOT give your baby any fever medicine before being seen. - Fever higher than 104° F (40° C) - Fever after vaccine given and weak immune system (such as sickle cell disease, HIV, cancer, organ transplant, taking oral steroids) - Crying nonstop lasts more than 3 hours - Rotavirus vaccine followed by vomiting or severe crying - Your child looks or acts very sick - You think your child needs to be seen, and the problem is urgent ### Contact Doctor Within 24 Hours - Redness around the shot becomes larger and more painful to touch after 3 days - Fever lasts more than 3 days - Fever returns after being gone more than 24 hours - Measles vaccine rash (starts day 6 to 12 after shot) lasts more than 4 days - You think your child needs to be seen, but the problem is not urgent ### Contact Doctor During Office Hours - Redness or red streak around shot is larger than 2 inches (5 cm) - Redness, swelling or pain is getting worse after 3 days - Fussiness from vaccine lasts more than 3 days - You have other questions or concerns ### Self Care at Home - Normal immunization reaction (mild redness and swelling, fever) ## Care Advice for Immunization Reactions ## Treatment for Common Immunization Reactions #### What You Should Know About Common Shot Reactions: - Immunizations (vaccines) protect your child against serious diseases. - Pain, redness and swelling are normal where the shot was given. Most symptoms start within the first 12 hours after the shot was given. Redness and fever starting on day 1 or 2 of the shot is always normal. - All of these reactions mean the vaccine is working. - Your child's body is making new antibodies to protect against the real disease. - Most of these symptoms will only last 2 or 3 days. - There is no need to see your doctor for normal reactions, such as redness or fever. - Here is some care advice that should help. #### Vaccine Site Reaction: Treatment - Some pain, swelling and skin redness at the injection site is normal. It means the vaccine is working. - Massage: gently massage the injection site 3 or more times a day. - Heat: for pain or redness, apply a heating pad or a warm wet washcloth to the area for 10 minutes. Repeat as needed. Reason: will increase blood flow to the area. May apply cold if you prefer, but avoid ice. - No Pain Medicine: try not to give any pain medicines. Reason: pain medicines may reduce the body's normal immune response. Use local heat instead. Pain rarely becomes bad. If needed, use acetaminophen. - Hives at the Shot Site: if itchy, can put on 1% hydrocortisone cream (such as Cortaid). No prescription is needed. Use twice daily as needed. #### Fever with Vaccines: Treatment - Fever with vaccines is normal, harmless and probably helpful. Reason: fever speeds up your body's immune system. - Fever with most vaccines begins within 12 hours and lasts 1 to 2 days. - For low grade fevers of 100-102\&deg F (37.8 to 39\&deg C), do not give fever medicines. Reason: they may reduce your body's normal immune response. - For fevers higher than 102° F (39° C), medicine may be given for discomfort. If needed, use acetaminophen. - Fluids. Encourage cool fluids in unlimited amounts. Reason: prevent dehydration. Fluids can also lower high fevers. For infants age younger than 6 months, only give formula or breastmilk. - Clothing. Dress in normal clothing. For shivering or the chills, use a blanket until it stops. #### General Symptoms from Vaccines: - All vaccines can cause mild fussiness, crying and restless sleep. This is usually due to a sore shot site. - Some children sleep more than usual. A decreased appetite and activity level are also common. - These symptoms are normal. They do not need any treatment. - They will usually go away in 24-48 hours. #### Call Your Doctor If: - Redness becomes larger than 2 inches (5 cm) - Redness becomes more painful after 3 days - Fever starts after 2 days (or lasts more than 3 days) - Redness or pain lasts more than 7 days - You think your child needs to be seen - Your child becomes worse ## Specific Immunization Reactions #### Chickenpox Vaccine: - Pain or swelling at the shot site for 1 to 2 days. (20% of children) - Mild fever lasting 1 to 3 days begins 14 to 28 days after the shot (10%). Give acetaminophen or ibuprofen for fever higher than 102° F (39°C). - Never give aspirin for fever, pain or within 6 weeks of getting the shot. Reason: risk of Reye syndrome, a rare but serious brain disease. - Chickenpox-like rash (usually 2 red bumps) at the shot site (3%) - Chickenpox-like rash (usually 5 red bumps) scattered over the body (4%) - This mild rash begins 5 to 26 days after the shot. Most often, it lasts a few days. - Children with these rashes can go to child care or school. Reason: for practical purposes, vaccine rashes are not spread to others. - Exception: do not go to school if red bumps drain fluid and are widespread. Reason: can be actual chickenpox. - Caution: if vaccine rash contains fluid, cover it with clothing. You can also use a bandage. #### COVID-19 Vaccine - Injection site reactions. Pain and tenderness starts within 8 hours (90% of patients). Other local reactions are some swelling (10%) or skin redness (5%). Local symptoms usually last 1 to 3 days. - General body symptoms after the second dose. Fever (15%), chills (40%), tiredness (70%), muscle aches (50%) and headaches (60%). Some other mild side effects are decreased appetite, nausea, dizziness, and increased sleep. - General symptoms start at about 24 hours. They usually last 1 day, sometimes 2. - Vaccines with 2 doses. Symptoms are more frequent after the 2nd vaccine. - Vaccines with one dose. Side effects were the same type, but a little less often. - Booster shots. Side effects much the same. - The vaccine does not cause any respiratory symptoms such as cough, runny nose, sore throat or shortness of breath. - It is impossible to get COVID-19 from the vaccine. Reason: there is no live COVID-19 virus in the vaccine. - Severe allergic reactions to the vaccine are very rare. #### Diphtheria, Tetanus, Pertussis (DTaP) Vaccine: - The following harmless reactions to DTaP can occur: - Pain, tenderness, swelling and redness at the shot site are the main side effects. This happens in 25% of children. It usually starts within the first 12 hours. Redness and fever starting on day 1 of the shot is always normal. It lasts for 3 to 7 days. - Fever (in 25% of children) and lasts for 24 to 48 hours - Mild drowsiness (30%), fretfulness (30%) or poor appetite (10%) and lasts for 24 to 48 hours. - Large swelling over 4 inches (10 cm) can follow the later doses of DTaP. The area of redness is smaller. This usually occurs with the 4th or 5th dose. It occurs in 5% of children. Most children can still move the leg or arm normally. - The large thigh or upper arm swelling goes away without treatment by day 3 (60%) to day 7 (90%). - This is not an allergy. Future DTaP vaccines are safe to give. #### Hemophilus Influenza Type B Vaccine (Hib): - No serious reactions reported. - Sore injection site or mild fever only occurs in 2% of children. #### Hepatitis A Vaccine: - No serious reactions reported. - Sore injection occurs in 20% of children. - Loss of appetite occurs in 10% of children. - Headache occurs in 5% of children. - Most often, no fever is present. - If these symptoms occur, they most often last 1-2 days. #### Hepatitis B Virus Vaccine (HBV): - No serious reactions reported. - Sore shot site occurs in 30% of children and mild fever in 3% of children. - Fever from the vaccine is rare. Any baby under 2 months with a fever after this shot should be examined. #### Influenza Virus Vaccine: - Pain, tenderness or swelling at the injection site occurs within 6 to 8 hours. This happens in 10% of children. - Mild fever less than 103° F (39.5° C) occurs in 20% of children. Fevers mainly occur in young children. - Nasal Influenza Vaccine: congested or runny nose, mild fever. #### Measles, Mumps and Rubella Vaccine (MMR): - This shot can cause soreness at the shot site. A fever (10% of children) and rash (5% of children) may occur about 6 to 12 days after the shot. - Mild fever less than 103° F (39.5°C) in 10% and lasts 2 or 3 days. - The mild pink rash is mainly on the trunk and lasts 2 or 3 days. - No treatment is needed. The rash cannot be spread to others. Your child can go to childcare or to school with the rash. - Call Your Doctor If: - Rash changes to blood-colored spots - Rash lasts more than 3 days #### Meningococcal Vaccine: - No serious reactions. - Sore shot site for 1 to 2 days occurs in 50%. Limited use of the arm occurs in 15% of children. - Mild fever occurs in 5%, headache in 40% and joint pain in 20% - The vaccine never causes meningitis. #### Papillomavirus Vaccine: - No serious reactions. - Sore injection site for few days in 90%. - Mild redness and swelling at the shot site (in 50%). - Fever higher than 100.4° F (38.0° C) in 10% and fever higher than 102° F (39° C) in 2%. - Headache in 30%. #### Pneumococcal Vaccine: - No serious reactions. - Pain, tenderness, swelling or redness at the injection site in 20%. - Mild fever less than 102° F (39° C) in 15% for 1-2 days. #### Polio Vaccine: - Polio vaccine given by shot sometimes causes some muscle soreness. - Polio vaccine given by mouth is no longer used in the U.S. #### Rotavirus Vaccine: - Most often, no serious reactions to this vaccine given by mouth. - Mild diarrhea or vomiting for 1 to 2 days in 3%. - No fever. - Rare serious reaction: intussusception. Risk is 1 in 100,000 (CDC). Presents with vomiting or severe crying. #### BCG Vaccine for Tuberculosis (TB): - Vaccine used to prevent TB in high-risk groups or countries. It is not used in the US or most of Canada. Note: this is different than the skin test placed on the forearm to detect TB. - BCG vaccine is given into the skin of the right shoulder area. - Timing: mainly given to infants and young children. - Normal reaction: after 6 to 8 weeks, a blister forms. It gradually enlarges and eventually drains a whitish yellow liquid. The blister then heals over leaving a scar. The raised scar is proof of BCG protection against TB. - Abnormal reaction: abscess (infected lump) occurs in the shoulder or under the arm. Occurs in 1% of patients. - Call Your Doctor If: - Blister turns into a large red lump - Lymph node in the armpit becomes large Last Reviewed: 05/01/2025 Last Revised: 03/05/2025 Copyright 2000-2025 Schmitt Pediatric Guidelines LLC.
Shard	18 (laksa)
Root Hash	14744512740537047218
Unparsed URL	org,seattlechildrens!www,/conditions/a-z/immunization-reactions/ s443