🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 5 (from laksa082)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa005.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.techarp.com/science/pfizer-vs-sinovac-child-vaccine/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/","crawl_time":1774387074,"first_indexed_time":1647838253,"http_code":200,"src_unparsed":"com,techarp!www,\/science\/pfizer-vs-sinovac-child-vaccine\/ s443","src_root_hash":"6550559042993769005","history_drop_reason":null,"meta_title":"Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? | Tech ARP","meta_descriptions":["Here is a quick summary of both the Pfizer and Sinovac child vaccines, as well as their safety and their efficacy against COVID-19!"],"attrs_boilerpipe_text":"Spread the love\nNow that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child?\nHere is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19!\nPfizer vs. Sinovac Child Vaccine :\nDifferent From Adult Vaccines?\nOne of the first questions parents ask me is if the Pfizer and\/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines.\nThe Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children.\nHere is a simple and quick comparison :\nCharacteristics\nPfizer Vaccine\nfor Kids\nSinovac Vaccine\nfor Kids\nFormulation\nImproved with Tris buffer\nMore stable, longer storage\nNo change\nNo. of Doses\n2 Doses\nNo change\n2 Doses\nNo change\nDosage\n10 micrograms\n1\/3 of adult dose\n3 micrograms\nSame as adult dose\nVolume\n0.2 ml\n2\/3 of adult vaccine\n0.5 ml\nSame as adult vaccine\nDose Interval\n8 Weeks *\n5 weeks longer\n4 weeks\nSame as adult vaccine\n* In some countries only, Pfizer still recommends the original 3-week dose interval\nPfizer vs. Sinovac Vaccine :\nWhich Is Better For Your Child?\nPfizer Child Vaccine Efficacy :\n90.7%\nThe Pfizer bridging study showed that their lower-dose paediatric vaccine was\n90.7% efficacious\nin preventing symptomatic COVID-19 infection.\nTheir study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2.\nOne Month\nAfter Dose 2\nGeometric Mean Titres\n(GMT)\nDifference\nUSA-WA1\/2020 (Reference)\n365.3\n+36.5X\nB.1.617.2 (Delta)\n294.9\n+29.5X\nUnvaccinated\n10\nBaseline\nSinovac Child Vaccine Efficacy :\nUnknown\nBack in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age.\nHowever, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant.\nWe do know that the\nadult dose\nwas only\n50.4% efficacious\nin preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has\nzero efficacy\nagainst the Omicron variant (see link and table below).\nIt seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants.\nRead more :\nWhat HKU Study Revealed About Pfizer \/ Sinovac vs. Omicron\nCOVID-19\nVariant\nSeropositive Rate\nMN Titer (GMT)\nPfizer\nSinovac\nPfizer\nSinovac\nHKU691 Omicron\n20%\n0%\n5.43\nMin.\nHKU344-R346K\nOmicron\n24%\n0%\n6.42\nMin.\nDelta\n100%\n68%\n124.7\n10.3\nBeta\n100%\n0%\n25.7\nMin.\nAlpha\n100%\n100%\n229.4\n21.7\nPfizer Is Definitely Better Than Sinovac For Your Child\nUntil there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the\nPfizer COMIRNATY paediatric vaccine\n.\nAt least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be\n90.7% efficacious\nin preventing symptomatic COVID-19 infections in 5-11 year-old children.\nIt is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants.\nIf you want the best protection for your child, get the new\nPfizer vaccine for kids\n. Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine.\nRead more :\nSinovac Vaccine for 5-11 Yo Kids : What You Need To Know!\nRead more :\nPfizer COVID-19 Vaccine For Kids : What You Need To Know!\nPfizer vs. Sinovac Vaccine :\nWhich Is Safer For Your Child?\nThis is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine.\nThere isn’t a straight answer, because safety has to be balanced against the risk of injury from a\nbreakthrough infection\n– getting COVID-19 despite being vaccinated.\nSinovac Vaccine :\nFewer Side Effects But Low Efficacy\nThe Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose.\nWhile parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus.\nPfizer Vaccine :\nMore Side Effects But Much Higher Efficacy\nThe Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows :\nPfizer : 1 in every 1.11 million doses\nAstraZeneca : 1 in every 1.43 million doses\nSinovac : 1 in every 2 million doses\nAge Groups\nMyocarditis Events\n(Per Million Doses)\nPfizer\nAstraZeneca\nSinovac\nOverall\n0.9\n0.7\n0.5\nOver 30 Years\n1.0\nNA\n0.6\n30 Years + Younger\n0.87\nNA\n0.49\nWe must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection.\nIn fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine.\nHere is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection.\nMyocarditis\nRisk\nPer Million\nPeople\nvs\nSinovac\nvs\nAstraZeneca\nvs\nPfizer\nCOVID-19\n450\n+300x\n+214x\n+167x\n3x Pfizer\n2.7\n+1.8x\n+1.3x\nBaseline\n3x AstraZeneca\n2.1\n+1.4x\nBaseline\n-0.2x\n3x Sinovac\n1.5\nBaseline\n-0.3x\n-0.4x\nNo matter how you slice and dice the results, it is very clear that the risk of myocarditis is\nGREATEST\nwith a\nsingle\nCOVID-19 infection, than it is with\nTHREE doses\nof the Pfizer, AstraZeneca or Sinovac vaccines.\nIf you are worried about your child getting myocarditis, you should definitely protect him\/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine.\nPlease Support My Work!\nSupport my work through a bank transfer \/  PayPal \/ credit card!\nName : Adrian Wong\nBank Transfer :\nCIMB 7064555917\n(Swift Code : CIBBMYKL)\nCredit Card \/ Paypal :\nhttps:\/\/paypal.me\/techarp\nDr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called\nBreaking Through The BIOS Barrier (ISBN 978-0131455368)\nwhile in medical school.\nHe continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world.\nRecommended Reading\nDid Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?\nIs Pfizer Vaccine Causing Japanese Encephalitis In Australia?!\nDid Putin Humiliate Japan With His American Dog?!\nDid Pfizer Vaccine Documents Reveal 1,291 Side Effects?!\nIs There Poison In COVID-19 Rapid Antigen Test Kits?!\nGo Back To >\n \nHealth\n |\nTech ARP\nSupport Tech ARP!\nPlease support us by \nvisiting our sponsors\n, participating in the \nTech ARP Forums\n, or \ndonating to our fund\n. Thank you!","attrs_markdown":"![Tech ARP](https:\/\/www.techarp.com\/wp-content\/uploads\/2018\/04\/techarp_title1.jpg)  [![Tech ARP](https:\/\/www.techarp.com\/wp-content\/uploads\/2018\/04\/techarp_title1.jpg) ![Tech ARP](https:\/\/www.techarp.com\/wp-content\/uploads\/2018\/04\/techarp_title1.jpg)](https:\/\/www.techarp.com\/ \"Tech ARP\")\n\n- [Computer](https:\/\/www.techarp.com\/computer\/)\n- [Mobile](https:\/\/www.techarp.com\/mobile\/)\n- [Games](https:\/\/www.techarp.com\/gaming\/)\n- [Enterprise & Biz](https:\/\/www.techarp.com\/business\/)\n- [Cybersecurity](https:\/\/www.techarp.com\/cybersecurity\/)\n- [Photography](https:\/\/www.techarp.com\/photo-video\/)\n- [Auto + Aero](https:\/\/www.techarp.com\/travel\/)\n- [Home Tech](https:\/\/www.techarp.com\/home\/)\n- [BIOS Guide](https:\/\/www.techarp.com\/bios-guide\/)\n- [Forums](http:\/\/forums.techarp.com\/)\n\nMenu\n\n- [Computer](https:\/\/www.techarp.com\/computer\/)\n- [Mobile](https:\/\/www.techarp.com\/mobile\/)\n- [Games](https:\/\/www.techarp.com\/gaming\/)\n- [Enterprise & Biz](https:\/\/www.techarp.com\/business\/)\n- [Cybersecurity](https:\/\/www.techarp.com\/cybersecurity\/)\n- [Photography](https:\/\/www.techarp.com\/photo-video\/)\n- [Auto + Aero](https:\/\/www.techarp.com\/travel\/)\n- [Home Tech](https:\/\/www.techarp.com\/home\/)\n- [BIOS Guide](https:\/\/www.techarp.com\/bios-guide\/)\n- [Forums](http:\/\/forums.techarp.com\/)\n\n[Home](https:\/\/www.techarp.com\/)\n\n[Science Articles + News\\!](https:\/\/www.techarp.com\/science\/ \"Science Articles + News!\")\n\n# Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?\nPosted by [Dr. Adrian Wong](https:\/\/www.techarp.com\/author\/adrian\/)\n\nDate:\n\nMarch 21, 2022\n\n#### share\n[0](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/)   [0](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/) [0](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/)\n\nSpread the love\n\nNow that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child?\n\nHere is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19\\!\n\n## Pfizer vs. Sinovac Child Vaccine : Different From Adult Vaccines?\nOne of the first questions parents ask me is if the Pfizer and\/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines.\n\nThe Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children.\n\nHere is a simple and quick comparison :\n\n|   |   |   |\n|---|---|---|\n| **Characteristics** | **Pfizer Vaccine  for Kids** | **Sinovac Vaccine  for Kids** |\n| **Formulation** | **Improved with Tris buffer**  **More stable, longer storage** | **No change** |\n| **No. of Doses** | **2 Doses**  No change | **2 Doses**  No change |\n| **Dosage** | **10 micrograms**  **1\/3 of adult dose** | **3 micrograms**  **Same as adult dose** |\n| **Volume** | **0\\.2 ml**  **2\/3 of adult vaccine** | **0\\.5 ml**  **Same as adult vaccine** |\n| **Dose Interval** | **8 Weeks \\***  **5 weeks longer** | **4 weeks**  **Same as adult vaccine** |\n\n\\* In some countries only, Pfizer still recommends the original 3-week dose interval\n\n## Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?\n**Pfizer Child Vaccine Efficacy : 90\\.7%**\n\nThe Pfizer bridging study showed that their lower-dose paediatric vaccine was **90\\.7% efficacious** in preventing symptomatic COVID-19 infection.\n\nTheir study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2.\n\n|   |   |   |\n|---|---|---|\n| **One Month  After Dose 2** | **Geometric Mean Titres  (GMT)** | **Difference** |\n| **USA-WA1\/2020 (Reference)** | **365\\.3** | **\\+36.5X** |\n| **B.1.617.2 (Delta)** | **294\\.9** | **\\+29.5X** |\n| **Unvaccinated** | **10** | **Baseline** |\n\n**Sinovac Child Vaccine Efficacy : Unknown**\n\nBack in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age.\n\nHowever, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant.\n\nWe do know that the adult dose was only **50\\.4% efficacious** in preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has [**zero efficacy**](https:\/\/www.techarp.com\/science\/pfizer-sinovac-omicron-study\/) against the Omicron variant (see link and table below).\n\nIt seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants.\n\n**Read more : [What HKU Study Revealed About Pfizer \/ Sinovac vs. Omicron](https:\/\/www.techarp.com\/science\/pfizer-sinovac-omicron-study\/)**\n\n|   |   |   |   |   |\n|---|---|---|---|---|\n| **COVID-19  Variant** | **Seropositive Rate** | **MN Titer (GMT)** |   |   |\n| **Pfizer** | **Sinovac** | **Pfizer** | **Sinovac** |   |\n| **HKU691 Omicron** | **20%** | **0%** | **5\\.43** | **Min.** |\n| **HKU344-R346K  Omicron** | **24%** | **0%** | **6\\.42** | **Min.** |\n| **Delta** | **100%** | **68%** | **124\\.7** | **10\\.3** |\n| **Beta** | **100%** | **0%** | **25\\.7** | **Min.** |\n| **Alpha** | **100%** | **100%** | **229\\.4** | **21\\.7** |\n\n**Pfizer Is Definitely Better Than Sinovac For Your Child**\n\nUntil there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the [**Pfizer COMIRNATY paediatric vaccine**](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/).\n\nAt least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be **90\\.7% efficacious** in preventing symptomatic COVID-19 infections in 5-11 year-old children.\n\nIt is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants.\n\nIf you want the best protection for your child, get the new [**Pfizer vaccine for kids**](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/). Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine.\n\n**Read more : [Sinovac Vaccine for 5-11 Yo Kids : What You Need To Know\\!](https:\/\/www.techarp.com\/science\/sinovac-5-11-yo-kids-vaccine\/)**  \n **Read more : [Pfizer COVID-19 Vaccine For Kids : What You Need To Know\\!](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/)**\n\n![Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2022\/03\/Pfizer-vs-Sinovac-child-vaccine-comparison.jpg?resize=900%2C450&ssl=1)\n\n## Pfizer vs. Sinovac Vaccine : Which Is Safer For Your Child?\nThis is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine.\n\nThere isn’t a straight answer, because safety has to be balanced against the risk of injury from a [**breakthrough infection**](https:\/\/www.techarp.com\/science\/covid-19-vaccine-breakthrough\/) – getting COVID-19 despite being vaccinated.\n\n**Sinovac Vaccine : Fewer Side Effects But Low Efficacy**\n\nThe Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose.\n\nWhile parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus.\n\n**Pfizer Vaccine : More Side Effects But Much Higher Efficacy**\n\nThe Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows :\n\n- Pfizer : 1 in every 1.11 million doses\n- AstraZeneca : 1 in every 1.43 million doses\n- Sinovac : 1 in every 2 million doses\n\n|   |   |   |   |\n|---|---|---|---|\n| **Age Groups** | **Myocarditis Events  (Per Million Doses)** |   |   |\n| **Pfizer** | **AstraZeneca** | **Sinovac** |   |\n| **Overall** | **0\\.9** | **0\\.7** | **0\\.5** |\n| **Over 30 Years** | **1\\.0** | **NA** | **0\\.6** |\n| **30 Years + Younger** | **0\\.87** | **NA** | **0\\.49** |\n\nWe must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection.\n\nIn fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine.\n\nHere is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection.\n\n![SAFECOVAC : Ultra-Low Myocarditis Risk From Vaccines\\!](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2022\/01\/Myocarditis-COVID-19-comparison-SafeCOVAC.jpg?resize=545%2C320&ssl=1)\n\n|   |   |   |   |   |\n|---|---|---|---|---|\n| **Myocarditis  Risk** | **Per Million  People** | **vs  Sinovac** | **vs  AstraZeneca** | **vs  Pfizer** |\n| **COVID-19** | **450** | **\\+300x** | **\\+214x** | **\\+167x** |\n| **3x Pfizer** | **2\\.7** | **\\+1.8x** | **\\+1.3x** | **Baseline** |\n| **3x AstraZeneca** | **2\\.1** | **\\+1.4x** | **Baseline** | **\\-0.2x** |\n| **3x Sinovac** | **1\\.5** | **Baseline** | **\\-0.3x** | **\\-0.4x** |\n\nNo matter how you slice and dice the results, it is very clear that the risk of myocarditis is **GREATEST** with a single COVID-19 infection, than it is with THREE doses of the Pfizer, AstraZeneca or Sinovac vaccines.\n\n**If you are worried about your child getting myocarditis, you should definitely protect him\/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine.**\n\n## Please Support My Work\\!\n**[![](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2021\/04\/Dr.-Adrian-Wong-small.jpg?resize=200%2C200&ssl=1)](https:\/\/www.techarp.com\/articles\/do-no-reject-vaccine-offered\/attachment\/dr-adrian-wong-small\/)Support my work through a bank transfer \/ PayPal \/ credit card\\!**\n\n**Name : Adrian Wong** **Bank Transfer : CIMB 7064555917 (Swift Code : CIBBMYKL)  Credit Card \/ Paypal : <https:\/\/paypal.me\/techarp>**\n\nDr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called *Breaking Through The BIOS Barrier (ISBN 978-0131455368)* while in medical school.\n\nHe continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world.\n## Recommended Reading\n- [**Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?**](https:\/\/www.techarp.com\/science\/pfizer-158k-adverse-events\/)\n- [**Is Pfizer Vaccine Causing Japanese Encephalitis In Australia?\\!**](https:\/\/www.techarp.com\/science\/pfizer-japanese-encephalitis-facts\/)\n- **[Did Putin Humiliate Japan With His American Dog?\\!](https:\/\/www.techarp.com\/internet\/putin-humiliate-japan-american-dog\/)**\n- **[Did Pfizer Vaccine Documents Reveal 1,291 Side Effects?\\!](https:\/\/www.techarp.com\/science\/pfizer-vaccine-1291-side-effects\/)**\n- **[Is There Poison In COVID-19 Rapid Antigen Test Kits?\\!](https:\/\/www.techarp.com\/science\/poison-rapid-antigen-test-facts\/)**\n## Go Back To \\> [Health](https:\/\/www.techarp.com\/science\/) \\| [Tech ARP](https:\/\/www.techarp.com\/)\n## Support Tech ARP\\!\nPlease support us by **visiting our sponsors**, participating in the [**Tech ARP Forums**](http:\/\/forums.techarp.com\/), or [**donating to our fund**](https:\/\/www.techarp.com\/events\/tech-arp-server-upgrade-in-progress\/#donation). Thank you\\!\n\n### Share this:\n- [Click to share on X (Opens in new window) X](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?share=twitter)\n- [Click to share on Facebook (Opens in new window) Facebook](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?share=facebook)\n- [Click to share on Reddit (Opens in new window) Reddit](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?share=reddit)\n- [Click to share on Pinterest (Opens in new window) Pinterest](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?share=pinterest)\n- [Click to share on Tumblr (Opens in new window) Tumblr](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?share=tumblr)\n\n### Like this:\nLike Loading...\n\nTags:[Business](https:\/\/www.techarp.com\/tag\/business\/)[Children](https:\/\/www.techarp.com\/tag\/children\/)[Coronavirus](https:\/\/www.techarp.com\/tag\/coronavirus\/)[COVID-19](https:\/\/www.techarp.com\/tag\/covid-19\/)[Health](https:\/\/www.techarp.com\/tag\/health\/)[Healthcare](https:\/\/www.techarp.com\/tag\/healthcare\/)[KKM](https:\/\/www.techarp.com\/tag\/kkm\/)[Malaysia](https:\/\/www.techarp.com\/tag\/malaysia\/)[Medicine](https:\/\/www.techarp.com\/tag\/medicine\/)[Pfizer](https:\/\/www.techarp.com\/tag\/pfizer\/)[Pharmaceutical](https:\/\/www.techarp.com\/tag\/pharmaceutical\/)[Pharmaniaga](https:\/\/www.techarp.com\/tag\/pharmaniaga\/)[Safety](https:\/\/www.techarp.com\/tag\/safety\/)[Science](https:\/\/www.techarp.com\/tag\/science\/)[Sinovac](https:\/\/www.techarp.com\/tag\/sinovac\/)[Vaccine](https:\/\/www.techarp.com\/tag\/vaccine\/)[Virus](https:\/\/www.techarp.com\/tag\/virus\/)\n\n[Previous : Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?\\!](https:\/\/www.techarp.com\/science\/pfizer-158k-adverse-events\/)\n\n[Next : How To Register Overseas Vaccination In MySejahtera\\!](https:\/\/www.techarp.com\/software\/mysejahtera-overseas-vaccination\/)\n\n#### About The Author\n![](https:\/\/secure.gravatar.com\/avatar\/119fc2ad7d5bec3047430df137bab8fc?s=80&d=mm&r=g)\n\n[Dr. Adrian Wong](https:\/\/www.techarp.com\/author\/adrian\/)\n\nDr. Adrian Wong has been researching and writing about technology and science since 1997. During medical school, he published Breaking Through The BIOS Barrier (ISBN 978-0131455368) with Prentice Hall. Today, he devotes his time to tracking tech trends and debunking misinformation to ensure readers have access to verified facts.\n### Leave a Reply[Cancel reply](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/#respond)\n[![](https:\/\/avn.innity.com\/view\/alt\/?campaignid=32291&adid=275656&cb=[timestamp])](https:\/\/avn.innity.com\/click\/?adid=275656&cb=[timestamp])\n\n#### Tech ARP Premium Partner\n[![HUAWEI partner logo](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2019\/04\/HUAWEI-partner-logo-2.png?fit=360%2C95&ssl=1)](https:\/\/www.techarp.com\/huawei-partner-logo-2\/)\n\n[![Samsung premium partner logo](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2019\/04\/Samsung-partner-logo.png?fit=360%2C72&ssl=1)](https:\/\/www.techarp.com\/samsung-partner-logo\/)\n\n#### Tech ARP Partners\n[![WD partner logo](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2019\/04\/WD-partner-logo-2.png?fit=360%2C95&ssl=1)](https:\/\/www.techarp.com\/wd-partner-logo-2\/)\n\n[![Acer news partner logo](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2021\/04\/Acer-news-partner-logo.jpg?fit=360%2C75&ssl=1)](https:\/\/www.techarp.com\/acer-news-partner-logo\/)\n\n#### News Partners\n[![Vivo news partner logo](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2021\/04\/Vivo-news-partner-logo.jpg?fit=360%2C75&ssl=1)](https:\/\/www.techarp.com\/vivo-news-partner-logo\/)\n#### Recommended Reading\n#### Sponsored Links\n#### Tags\n[Android](https:\/\/www.techarp.com\/tag\/android\/) [Android Smartphone](https:\/\/www.techarp.com\/tag\/android-smartphone\/) [Business](https:\/\/www.techarp.com\/tag\/business\/) [Celebrity](https:\/\/www.techarp.com\/tag\/celebrity\/) [Conspiracy](https:\/\/www.techarp.com\/tag\/conspiracy\/) [Controversy](https:\/\/www.techarp.com\/tag\/controversy\/) [Coronavirus](https:\/\/www.techarp.com\/tag\/coronavirus\/) [COVID-19](https:\/\/www.techarp.com\/tag\/covid-19\/) [Epic Games](https:\/\/www.techarp.com\/tag\/epic-games\/) [Facebook](https:\/\/www.techarp.com\/tag\/facebook\/) [Fact](https:\/\/www.techarp.com\/tag\/fact\/) [Fact Check](https:\/\/www.techarp.com\/tag\/fact-check\/) [Facts](https:\/\/www.techarp.com\/tag\/facts\/) [Fake](https:\/\/www.techarp.com\/tag\/fake\/) [Fake News](https:\/\/www.techarp.com\/tag\/fake-news\/) [Free](https:\/\/www.techarp.com\/tag\/free\/) [Freebie](https:\/\/www.techarp.com\/tag\/freebie\/) [Free game](https:\/\/www.techarp.com\/tag\/free-game\/) [Free Games](https:\/\/www.techarp.com\/tag\/free-games\/) [Free software](https:\/\/www.techarp.com\/tag\/free-software\/) [Game](https:\/\/www.techarp.com\/tag\/game\/) [Gaming](https:\/\/www.techarp.com\/tag\/gaming\/) [Government](https:\/\/www.techarp.com\/tag\/government\/) [Health](https:\/\/www.techarp.com\/tag\/health\/) [Healthcare](https:\/\/www.techarp.com\/tag\/healthcare\/) [Hoax](https:\/\/www.techarp.com\/tag\/hoax\/) [Law](https:\/\/www.techarp.com\/tag\/law\/) [Malaysia](https:\/\/www.techarp.com\/tag\/malaysia\/) [Medicine](https:\/\/www.techarp.com\/tag\/medicine\/) [Offer](https:\/\/www.techarp.com\/tag\/offer\/) [PC Game](https:\/\/www.techarp.com\/tag\/pc-game\/) [PC Gaming](https:\/\/www.techarp.com\/tag\/pc-gaming\/) [Propaganda](https:\/\/www.techarp.com\/tag\/propaganda\/) [Safety](https:\/\/www.techarp.com\/tag\/safety\/) [Samsung](https:\/\/www.techarp.com\/tag\/samsung\/) [Science](https:\/\/www.techarp.com\/tag\/science\/) [Smartphone](https:\/\/www.techarp.com\/tag\/smartphone\/) [Social media](https:\/\/www.techarp.com\/tag\/social-media\/) [Software](https:\/\/www.techarp.com\/tag\/software\/) [Twitter](https:\/\/www.techarp.com\/tag\/twitter\/) [United States](https:\/\/www.techarp.com\/tag\/united-states\/) [Vaccination](https:\/\/www.techarp.com\/tag\/vaccination\/) [Vaccine](https:\/\/www.techarp.com\/tag\/vaccine\/) [Video](https:\/\/www.techarp.com\/tag\/video\/) [Virus](https:\/\/www.techarp.com\/tag\/virus\/)\n\nCopyright © 2015-2026 by Dr. Adrian Wong. Proudly made in Malaysia\\!\n\n[Go to mobile version](https:\/\/www.techarp.com\/science\/pfizer-vs-sinovac-child-vaccine\/?amp=1)\n\n%d","attrs_readable_markdown":"Spread the love\n\nNow that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child?\n\nHere is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19\\!\n\n## Pfizer vs. Sinovac Child Vaccine : Different From Adult Vaccines?\nOne of the first questions parents ask me is if the Pfizer and\/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines.\n\nThe Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children.\n\nHere is a simple and quick comparison :\n\n|   |   |   |\n|---|---|---|\n| **Characteristics** | **Pfizer Vaccine  for Kids** | **Sinovac Vaccine  for Kids** |\n| **Formulation** | **Improved with Tris buffer**  **More stable, longer storage** | **No change** |\n| **No. of Doses** | **2 Doses**  No change | **2 Doses**  No change |\n| **Dosage** | **10 micrograms**  **1\/3 of adult dose** | **3 micrograms**  **Same as adult dose** |\n| **Volume** | **0\\.2 ml**  **2\/3 of adult vaccine** | **0\\.5 ml**  **Same as adult vaccine** |\n| **Dose Interval** | **8 Weeks \\***  **5 weeks longer** | **4 weeks**  **Same as adult vaccine** |\n\n\\* In some countries only, Pfizer still recommends the original 3-week dose interval\n\n## Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?\n**Pfizer Child Vaccine Efficacy : 90\\.7%**\n\nThe Pfizer bridging study showed that their lower-dose paediatric vaccine was **90\\.7% efficacious** in preventing symptomatic COVID-19 infection.\n\nTheir study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2.\n\n|   |   |   |\n|---|---|---|\n| **One Month  After Dose 2** | **Geometric Mean Titres  (GMT)** | **Difference** |\n| **USA-WA1\/2020 (Reference)** | **365\\.3** | **\\+36.5X** |\n| **B.1.617.2 (Delta)** | **294\\.9** | **\\+29.5X** |\n| **Unvaccinated** | **10** | **Baseline** |\n\n**Sinovac Child Vaccine Efficacy : Unknown**\n\nBack in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age.\n\nHowever, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant.\n\nWe do know that the adult dose was only **50\\.4% efficacious** in preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has [**zero efficacy**](https:\/\/www.techarp.com\/science\/pfizer-sinovac-omicron-study\/) against the Omicron variant (see link and table below).\n\nIt seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants.\n\n**Read more : [What HKU Study Revealed About Pfizer \/ Sinovac vs. Omicron](https:\/\/www.techarp.com\/science\/pfizer-sinovac-omicron-study\/)**\n\n|   |   |   |   |   |\n|---|---|---|---|---|\n| **COVID-19  Variant** | **Seropositive Rate** | **MN Titer (GMT)** |   |   |\n| **Pfizer** | **Sinovac** | **Pfizer** | **Sinovac** |   |\n| **HKU691 Omicron** | **20%** | **0%** | **5\\.43** | **Min.** |\n| **HKU344-R346K  Omicron** | **24%** | **0%** | **6\\.42** | **Min.** |\n| **Delta** | **100%** | **68%** | **124\\.7** | **10\\.3** |\n| **Beta** | **100%** | **0%** | **25\\.7** | **Min.** |\n| **Alpha** | **100%** | **100%** | **229\\.4** | **21\\.7** |\n\n**Pfizer Is Definitely Better Than Sinovac For Your Child**\n\nUntil there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the [**Pfizer COMIRNATY paediatric vaccine**](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/).\n\nAt least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be **90\\.7% efficacious** in preventing symptomatic COVID-19 infections in 5-11 year-old children.\n\nIt is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants.\n\nIf you want the best protection for your child, get the new [**Pfizer vaccine for kids**](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/). Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine.\n\n**Read more : [Sinovac Vaccine for 5-11 Yo Kids : What You Need To Know\\!](https:\/\/www.techarp.com\/science\/sinovac-5-11-yo-kids-vaccine\/)**  \n **Read more : [Pfizer COVID-19 Vaccine For Kids : What You Need To Know\\!](https:\/\/www.techarp.com\/science\/pfizer-vaccine-kids-update\/)**\n\n![Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2022\/03\/Pfizer-vs-Sinovac-child-vaccine-comparison.jpg?resize=900%2C450&ssl=1)\n\n## Pfizer vs. Sinovac Vaccine : Which Is Safer For Your Child?\nThis is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine.\n\nThere isn’t a straight answer, because safety has to be balanced against the risk of injury from a [**breakthrough infection**](https:\/\/www.techarp.com\/science\/covid-19-vaccine-breakthrough\/) – getting COVID-19 despite being vaccinated.\n\n**Sinovac Vaccine : Fewer Side Effects But Low Efficacy**\n\nThe Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose.\n\nWhile parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus.\n\n**Pfizer Vaccine : More Side Effects But Much Higher Efficacy**\n\nThe Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows :\n\n- Pfizer : 1 in every 1.11 million doses\n- AstraZeneca : 1 in every 1.43 million doses\n- Sinovac : 1 in every 2 million doses\n\n|   |   |   |   |\n|---|---|---|---|\n| **Age Groups** | **Myocarditis Events  (Per Million Doses)** |   |   |\n| **Pfizer** | **AstraZeneca** | **Sinovac** |   |\n| **Overall** | **0\\.9** | **0\\.7** | **0\\.5** |\n| **Over 30 Years** | **1\\.0** | **NA** | **0\\.6** |\n| **30 Years + Younger** | **0\\.87** | **NA** | **0\\.49** |\n\nWe must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection.\n\nIn fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine.\n\nHere is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection.\n\n![SAFECOVAC : Ultra-Low Myocarditis Risk From Vaccines\\!](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2022\/01\/Myocarditis-COVID-19-comparison-SafeCOVAC.jpg?resize=545%2C320&ssl=1)\n\n|   |   |   |   |   |\n|---|---|---|---|---|\n| **Myocarditis  Risk** | **Per Million  People** | **vs  Sinovac** | **vs  AstraZeneca** | **vs  Pfizer** |\n| **COVID-19** | **450** | **\\+300x** | **\\+214x** | **\\+167x** |\n| **3x Pfizer** | **2\\.7** | **\\+1.8x** | **\\+1.3x** | **Baseline** |\n| **3x AstraZeneca** | **2\\.1** | **\\+1.4x** | **Baseline** | **\\-0.2x** |\n| **3x Sinovac** | **1\\.5** | **Baseline** | **\\-0.3x** | **\\-0.4x** |\n\nNo matter how you slice and dice the results, it is very clear that the risk of myocarditis is **GREATEST** with a single COVID-19 infection, than it is with THREE doses of the Pfizer, AstraZeneca or Sinovac vaccines.\n\n**If you are worried about your child getting myocarditis, you should definitely protect him\/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine.**\n\n## Please Support My Work\\!\n**[![](https:\/\/i0.wp.com\/www.techarp.com\/wp-content\/uploads\/2021\/04\/Dr.-Adrian-Wong-small.jpg?resize=200%2C200&ssl=1)](https:\/\/www.techarp.com\/articles\/do-no-reject-vaccine-offered\/attachment\/dr-adrian-wong-small\/)Support my work through a bank transfer \/ PayPal \/ credit card\\!**\n\n**Name : Adrian Wong** **Bank Transfer : CIMB 7064555917 (Swift Code : CIBBMYKL)  Credit Card \/ Paypal : <https:\/\/paypal.me\/techarp>**\n\nDr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called *Breaking Through The BIOS Barrier (ISBN 978-0131455368)* while in medical school.\n\nHe continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world.\n## Recommended Reading\n- [**Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?**](https:\/\/www.techarp.com\/science\/pfizer-158k-adverse-events\/)\n- [**Is Pfizer Vaccine Causing Japanese Encephalitis In Australia?\\!**](https:\/\/www.techarp.com\/science\/pfizer-japanese-encephalitis-facts\/)\n- **[Did Putin Humiliate Japan With His American Dog?\\!](https:\/\/www.techarp.com\/internet\/putin-humiliate-japan-american-dog\/)**\n- **[Did Pfizer Vaccine Documents Reveal 1,291 Side Effects?\\!](https:\/\/www.techarp.com\/science\/pfizer-vaccine-1291-side-effects\/)**\n- **[Is There Poison In COVID-19 Rapid Antigen Test Kits?\\!](https:\/\/www.techarp.com\/science\/poison-rapid-antigen-test-facts\/)**\n## Go Back To \\> [Health](https:\/\/www.techarp.com\/science\/) \\| [Tech ARP](https:\/\/www.techarp.com\/)\n## Support Tech ARP\\!\nPlease support us by **visiting our sponsors**, participating in the [**Tech ARP Forums**](http:\/\/forums.techarp.com\/), or [**donating to our fund**](https:\/\/www.techarp.com\/events\/tech-arp-server-upgrade-in-progress\/#donation). Thank you\\!","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

24 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`	0.8 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.techarp.com/science/pfizer-vs-sinovac-child-vaccine/
Last Crawled	2026-03-24 21:17:54 (24 days ago)
First Indexed	2022-03-21 04:50:53 (4 years ago)
HTTP Status Code	200
Meta Title	Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? \| Tech ARP
Meta Description	Here is a quick summary of both the Pfizer and Sinovac child vaccines, as well as their safety and their efficacy against COVID-19!
Meta Canonical	null
Boilerpipe Text	Spread the love Now that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child? Here is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19! Pfizer vs. Sinovac Child Vaccine : Different From Adult Vaccines? One of the first questions parents ask me is if the Pfizer and/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines. The Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children. Here is a simple and quick comparison : Characteristics Pfizer Vaccine for Kids Sinovac Vaccine for Kids Formulation Improved with Tris buffer More stable, longer storage No change No. of Doses 2 Doses No change 2 Doses No change Dosage 10 micrograms 1/3 of adult dose 3 micrograms Same as adult dose Volume 0.2 ml 2/3 of adult vaccine 0.5 ml Same as adult vaccine Dose Interval 8 Weeks * 5 weeks longer 4 weeks Same as adult vaccine * In some countries only, Pfizer still recommends the original 3-week dose interval Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? Pfizer Child Vaccine Efficacy : 90.7% The Pfizer bridging study showed that their lower-dose paediatric vaccine was 90.7% efficacious in preventing symptomatic COVID-19 infection. Their study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2. One Month After Dose 2 Geometric Mean Titres (GMT) Difference USA-WA1/2020 (Reference) 365.3 +36.5X B.1.617.2 (Delta) 294.9 +29.5X Unvaccinated 10 Baseline Sinovac Child Vaccine Efficacy : Unknown Back in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age. However, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant. We do know that the adult dose was only 50.4% efficacious in preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has zero efficacy against the Omicron variant (see link and table below). It seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants. Read more : What HKU Study Revealed About Pfizer / Sinovac vs. Omicron COVID-19 Variant Seropositive Rate MN Titer (GMT) Pfizer Sinovac Pfizer Sinovac HKU691 Omicron 20% 0% 5.43 Min. HKU344-R346K Omicron 24% 0% 6.42 Min. Delta 100% 68% 124.7 10.3 Beta 100% 0% 25.7 Min. Alpha 100% 100% 229.4 21.7 Pfizer Is Definitely Better Than Sinovac For Your Child Until there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the Pfizer COMIRNATY paediatric vaccine . At least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be 90.7% efficacious in preventing symptomatic COVID-19 infections in 5-11 year-old children. It is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants. If you want the best protection for your child, get the new Pfizer vaccine for kids . Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine. Read more : Sinovac Vaccine for 5-11 Yo Kids : What You Need To Know! Read more : Pfizer COVID-19 Vaccine For Kids : What You Need To Know! Pfizer vs. Sinovac Vaccine : Which Is Safer For Your Child? This is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine. There isn’t a straight answer, because safety has to be balanced against the risk of injury from a breakthrough infection – getting COVID-19 despite being vaccinated. Sinovac Vaccine : Fewer Side Effects But Low Efficacy The Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose. While parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus. Pfizer Vaccine : More Side Effects But Much Higher Efficacy The Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows : Pfizer : 1 in every 1.11 million doses AstraZeneca : 1 in every 1.43 million doses Sinovac : 1 in every 2 million doses Age Groups Myocarditis Events (Per Million Doses) Pfizer AstraZeneca Sinovac Overall 0.9 0.7 0.5 Over 30 Years 1.0 NA 0.6 30 Years + Younger 0.87 NA 0.49 We must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection. In fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine. Here is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection. Myocarditis Risk Per Million People vs Sinovac vs AstraZeneca vs Pfizer COVID-19 450 +300x +214x +167x 3x Pfizer 2.7 +1.8x +1.3x Baseline 3x AstraZeneca 2.1 +1.4x Baseline -0.2x 3x Sinovac 1.5 Baseline -0.3x -0.4x No matter how you slice and dice the results, it is very clear that the risk of myocarditis is GREATEST with a single COVID-19 infection, than it is with THREE doses of the Pfizer, AstraZeneca or Sinovac vaccines. If you are worried about your child getting myocarditis, you should definitely protect him/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine. Please Support My Work! Support my work through a bank transfer / PayPal / credit card! Name : Adrian Wong Bank Transfer : CIMB 7064555917 (Swift Code : CIBBMYKL) Credit Card / Paypal : https://paypal.me/techarp Dr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called Breaking Through The BIOS Barrier (ISBN 978-0131455368) while in medical school. He continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world. Recommended Reading Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years? Is Pfizer Vaccine Causing Japanese Encephalitis In Australia?! Did Putin Humiliate Japan With His American Dog?! Did Pfizer Vaccine Documents Reveal 1,291 Side Effects?! Is There Poison In COVID-19 Rapid Antigen Test Kits?! Go Back To > Health \| Tech ARP Support Tech ARP! Please support us by visiting our sponsors , participating in the Tech ARP Forums , or donating to our fund . Thank you!
Markdown	![Tech ARP](https://www.techarp.com/wp-content/uploads/2018/04/techarp_title1.jpg) [![Tech ARP](https://www.techarp.com/wp-content/uploads/2018/04/techarp_title1.jpg) ![Tech ARP](https://www.techarp.com/wp-content/uploads/2018/04/techarp_title1.jpg)](https://www.techarp.com/ "Tech ARP") - [Computer](https://www.techarp.com/computer/) - [Mobile](https://www.techarp.com/mobile/) - [Games](https://www.techarp.com/gaming/) - [Enterprise & Biz](https://www.techarp.com/business/) - [Cybersecurity](https://www.techarp.com/cybersecurity/) - [Photography](https://www.techarp.com/photo-video/) - [Auto + Aero](https://www.techarp.com/travel/) - [Home Tech](https://www.techarp.com/home/) - [BIOS Guide](https://www.techarp.com/bios-guide/) - [Forums](http://forums.techarp.com/) Menu - [Computer](https://www.techarp.com/computer/) - [Mobile](https://www.techarp.com/mobile/) - [Games](https://www.techarp.com/gaming/) - [Enterprise & Biz](https://www.techarp.com/business/) - [Cybersecurity](https://www.techarp.com/cybersecurity/) - [Photography](https://www.techarp.com/photo-video/) - [Auto + Aero](https://www.techarp.com/travel/) - [Home Tech](https://www.techarp.com/home/) - [BIOS Guide](https://www.techarp.com/bios-guide/) - [Forums](http://forums.techarp.com/) [Home](https://www.techarp.com/) [Science Articles + News\!](https://www.techarp.com/science/ "Science Articles + News!") # Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? Posted by [Dr. Adrian Wong](https://www.techarp.com/author/adrian/) Date: March 21, 2022 #### share [0](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/) [0](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/) [0](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/) Spread the love Now that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child? Here is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19\! ## Pfizer vs. Sinovac Child Vaccine : Different From Adult Vaccines? One of the first questions parents ask me is if the Pfizer and/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines. The Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children. Here is a simple and quick comparison : \| \| \| \| \|---\|---\|---\| \| Characteristics \| Pfizer Vaccine for Kids \| Sinovac Vaccine for Kids \| \| Formulation \| Improved with Tris buffer More stable, longer storage \| No change \| \| No. of Doses \| 2 Doses No change \| 2 Doses No change \| \| Dosage \| 10 micrograms 1/3 of adult dose \| 3 micrograms Same as adult dose \| \| Volume \| 0\.2 ml 2/3 of adult vaccine \| 0\.5 ml Same as adult vaccine \| \| Dose Interval \| 8 Weeks \* 5 weeks longer \| 4 weeks Same as adult vaccine \| \* In some countries only, Pfizer still recommends the original 3-week dose interval ## Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? Pfizer Child Vaccine Efficacy : 90\.7% The Pfizer bridging study showed that their lower-dose paediatric vaccine was 90\.7% efficacious in preventing symptomatic COVID-19 infection. Their study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2. \| \| \| \| \|---\|---\|---\| \| One Month After Dose 2 \| Geometric Mean Titres (GMT) \| Difference \| \| USA-WA1/2020 (Reference) \| 365\.3 \| \+36.5X \| \| B.1.617.2 (Delta) \| 294\.9 \| \+29.5X \| \| Unvaccinated \| 10 \| Baseline \| Sinovac Child Vaccine Efficacy : Unknown Back in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age. However, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant. We do know that the adult dose was only 50\.4% efficacious in preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has [zero efficacy](https://www.techarp.com/science/pfizer-sinovac-omicron-study/) against the Omicron variant (see link and table below). It seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants. Read more : [What HKU Study Revealed About Pfizer / Sinovac vs. Omicron](https://www.techarp.com/science/pfizer-sinovac-omicron-study/) \| \| \| \| \| \| \|---\|---\|---\|---\|---\| \| COVID-19 Variant \| Seropositive Rate \| MN Titer (GMT) \| \| \| \| Pfizer \| Sinovac \| Pfizer \| Sinovac \| \| \| HKU691 Omicron \| 20% \| 0% \| 5\.43 \| Min. \| \| HKU344-R346K Omicron \| 24% \| 0% \| 6\.42 \| Min. \| \| Delta \| 100% \| 68% \| 124\.7 \| 10\.3 \| \| Beta \| 100% \| 0% \| 25\.7 \| Min. \| \| Alpha \| 100% \| 100% \| 229\.4 \| 21\.7 \| Pfizer Is Definitely Better Than Sinovac For Your Child Until there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the [Pfizer COMIRNATY paediatric vaccine](https://www.techarp.com/science/pfizer-vaccine-kids-update/). At least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be 90\.7% efficacious in preventing symptomatic COVID-19 infections in 5-11 year-old children. It is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants. If you want the best protection for your child, get the new [Pfizer vaccine for kids](https://www.techarp.com/science/pfizer-vaccine-kids-update/). Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine. Read more : [Sinovac Vaccine for 5-11 Yo Kids : What You Need To Know\!](https://www.techarp.com/science/sinovac-5-11-yo-kids-vaccine/) Read more : [Pfizer COVID-19 Vaccine For Kids : What You Need To Know\!](https://www.techarp.com/science/pfizer-vaccine-kids-update/) ![Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?](https://i0.wp.com/www.techarp.com/wp-content/uploads/2022/03/Pfizer-vs-Sinovac-child-vaccine-comparison.jpg?resize=900%2C450&ssl=1) ## Pfizer vs. Sinovac Vaccine : Which Is Safer For Your Child? This is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine. There isn’t a straight answer, because safety has to be balanced against the risk of injury from a [breakthrough infection](https://www.techarp.com/science/covid-19-vaccine-breakthrough/) – getting COVID-19 despite being vaccinated. Sinovac Vaccine : Fewer Side Effects But Low Efficacy The Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose. While parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus. Pfizer Vaccine : More Side Effects But Much Higher Efficacy The Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows : - Pfizer : 1 in every 1.11 million doses - AstraZeneca : 1 in every 1.43 million doses - Sinovac : 1 in every 2 million doses \| \| \| \| \| \|---\|---\|---\|---\| \| Age Groups \| Myocarditis Events (Per Million Doses) \| \| \| \| Pfizer \| AstraZeneca \| Sinovac \| \| \| Overall \| 0\.9 \| 0\.7 \| 0\.5 \| \| Over 30 Years \| 1\.0 \| NA \| 0\.6 \| \| 30 Years + Younger \| 0\.87 \| NA \| 0\.49 \| We must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection. In fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine. Here is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection. ![SAFECOVAC : Ultra-Low Myocarditis Risk From Vaccines\!](https://i0.wp.com/www.techarp.com/wp-content/uploads/2022/01/Myocarditis-COVID-19-comparison-SafeCOVAC.jpg?resize=545%2C320&ssl=1) \| \| \| \| \| \| \|---\|---\|---\|---\|---\| \| Myocarditis Risk \| Per Million People \| vs Sinovac \| vs AstraZeneca \| vs Pfizer \| \| COVID-19 \| 450 \| \+300x \| \+214x \| \+167x \| \| 3x Pfizer \| 2\.7 \| \+1.8x \| \+1.3x \| Baseline \| \| 3x AstraZeneca \| 2\.1 \| \+1.4x \| Baseline \| \-0.2x \| \| 3x Sinovac \| 1\.5 \| Baseline \| \-0.3x \| \-0.4x \| No matter how you slice and dice the results, it is very clear that the risk of myocarditis is GREATEST with a single COVID-19 infection, than it is with THREE doses of the Pfizer, AstraZeneca or Sinovac vaccines. If you are worried about your child getting myocarditis, you should definitely protect him/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine. ## Please Support My Work\! [![](https://i0.wp.com/www.techarp.com/wp-content/uploads/2021/04/Dr.-Adrian-Wong-small.jpg?resize=200%2C200&ssl=1)](https://www.techarp.com/articles/do-no-reject-vaccine-offered/attachment/dr-adrian-wong-small/)Support my work through a bank transfer / PayPal / credit card\! Name : Adrian Wong Bank Transfer : CIMB 7064555917 (Swift Code : CIBBMYKL) Credit Card / Paypal : <https://paypal.me/techarp> Dr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called Breaking Through The BIOS Barrier (ISBN 978-0131455368) while in medical school. He continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world. ## Recommended Reading - [Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?](https://www.techarp.com/science/pfizer-158k-adverse-events/) - [Is Pfizer Vaccine Causing Japanese Encephalitis In Australia?\!](https://www.techarp.com/science/pfizer-japanese-encephalitis-facts/) - [Did Putin Humiliate Japan With His American Dog?\!](https://www.techarp.com/internet/putin-humiliate-japan-american-dog/) - [Did Pfizer Vaccine Documents Reveal 1,291 Side Effects?\!](https://www.techarp.com/science/pfizer-vaccine-1291-side-effects/) - [Is There Poison In COVID-19 Rapid Antigen Test Kits?\!](https://www.techarp.com/science/poison-rapid-antigen-test-facts/) ## Go Back To \> [Health](https://www.techarp.com/science/) \\| [Tech ARP](https://www.techarp.com/) ## Support Tech ARP\! Please support us by visiting our sponsors, participating in the [Tech ARP Forums](http://forums.techarp.com/), or [donating to our fund](https://www.techarp.com/events/tech-arp-server-upgrade-in-progress/#donation). Thank you\! ### Share this: - [Click to share on X (Opens in new window) X](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?share=twitter) - [Click to share on Facebook (Opens in new window) Facebook](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?share=facebook) - [Click to share on Reddit (Opens in new window) Reddit](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?share=reddit) - [Click to share on Pinterest (Opens in new window) Pinterest](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?share=pinterest) - [Click to share on Tumblr (Opens in new window) Tumblr](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?share=tumblr) ### Like this: Like Loading... Tags:[Business](https://www.techarp.com/tag/business/)[Children](https://www.techarp.com/tag/children/)[Coronavirus](https://www.techarp.com/tag/coronavirus/)[COVID-19](https://www.techarp.com/tag/covid-19/)[Health](https://www.techarp.com/tag/health/)[Healthcare](https://www.techarp.com/tag/healthcare/)[KKM](https://www.techarp.com/tag/kkm/)[Malaysia](https://www.techarp.com/tag/malaysia/)[Medicine](https://www.techarp.com/tag/medicine/)[Pfizer](https://www.techarp.com/tag/pfizer/)[Pharmaceutical](https://www.techarp.com/tag/pharmaceutical/)[Pharmaniaga](https://www.techarp.com/tag/pharmaniaga/)[Safety](https://www.techarp.com/tag/safety/)[Science](https://www.techarp.com/tag/science/)[Sinovac](https://www.techarp.com/tag/sinovac/)[Vaccine](https://www.techarp.com/tag/vaccine/)[Virus](https://www.techarp.com/tag/virus/) [Previous : Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?\!](https://www.techarp.com/science/pfizer-158k-adverse-events/) [Next : How To Register Overseas Vaccination In MySejahtera\!](https://www.techarp.com/software/mysejahtera-overseas-vaccination/) #### About The Author ![](https://secure.gravatar.com/avatar/119fc2ad7d5bec3047430df137bab8fc?s=80&d=mm&r=g) [Dr. Adrian Wong](https://www.techarp.com/author/adrian/) Dr. Adrian Wong has been researching and writing about technology and science since 1997. During medical school, he published Breaking Through The BIOS Barrier (ISBN 978-0131455368) with Prentice Hall. Today, he devotes his time to tracking tech trends and debunking misinformation to ensure readers have access to verified facts. ### Leave a Reply[Cancel reply](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/#respond) [![](https://avn.innity.com/view/alt/?campaignid=32291&adid=275656&cb=[timestamp])](https://avn.innity.com/click/?adid=275656&cb=[timestamp]) #### Tech ARP Premium Partner [![HUAWEI partner logo](https://i0.wp.com/www.techarp.com/wp-content/uploads/2019/04/HUAWEI-partner-logo-2.png?fit=360%2C95&ssl=1)](https://www.techarp.com/huawei-partner-logo-2/) [![Samsung premium partner logo](https://i0.wp.com/www.techarp.com/wp-content/uploads/2019/04/Samsung-partner-logo.png?fit=360%2C72&ssl=1)](https://www.techarp.com/samsung-partner-logo/) #### Tech ARP Partners [![WD partner logo](https://i0.wp.com/www.techarp.com/wp-content/uploads/2019/04/WD-partner-logo-2.png?fit=360%2C95&ssl=1)](https://www.techarp.com/wd-partner-logo-2/) [![Acer news partner logo](https://i0.wp.com/www.techarp.com/wp-content/uploads/2021/04/Acer-news-partner-logo.jpg?fit=360%2C75&ssl=1)](https://www.techarp.com/acer-news-partner-logo/) #### News Partners [![Vivo news partner logo](https://i0.wp.com/www.techarp.com/wp-content/uploads/2021/04/Vivo-news-partner-logo.jpg?fit=360%2C75&ssl=1)](https://www.techarp.com/vivo-news-partner-logo/) #### Recommended Reading #### Sponsored Links #### Tags [Android](https://www.techarp.com/tag/android/) [Android Smartphone](https://www.techarp.com/tag/android-smartphone/) [Business](https://www.techarp.com/tag/business/) [Celebrity](https://www.techarp.com/tag/celebrity/) [Conspiracy](https://www.techarp.com/tag/conspiracy/) [Controversy](https://www.techarp.com/tag/controversy/) [Coronavirus](https://www.techarp.com/tag/coronavirus/) [COVID-19](https://www.techarp.com/tag/covid-19/) [Epic Games](https://www.techarp.com/tag/epic-games/) [Facebook](https://www.techarp.com/tag/facebook/) [Fact](https://www.techarp.com/tag/fact/) [Fact Check](https://www.techarp.com/tag/fact-check/) [Facts](https://www.techarp.com/tag/facts/) [Fake](https://www.techarp.com/tag/fake/) [Fake News](https://www.techarp.com/tag/fake-news/) [Free](https://www.techarp.com/tag/free/) [Freebie](https://www.techarp.com/tag/freebie/) [Free game](https://www.techarp.com/tag/free-game/) [Free Games](https://www.techarp.com/tag/free-games/) [Free software](https://www.techarp.com/tag/free-software/) [Game](https://www.techarp.com/tag/game/) [Gaming](https://www.techarp.com/tag/gaming/) [Government](https://www.techarp.com/tag/government/) [Health](https://www.techarp.com/tag/health/) [Healthcare](https://www.techarp.com/tag/healthcare/) [Hoax](https://www.techarp.com/tag/hoax/) [Law](https://www.techarp.com/tag/law/) [Malaysia](https://www.techarp.com/tag/malaysia/) [Medicine](https://www.techarp.com/tag/medicine/) [Offer](https://www.techarp.com/tag/offer/) [PC Game](https://www.techarp.com/tag/pc-game/) [PC Gaming](https://www.techarp.com/tag/pc-gaming/) [Propaganda](https://www.techarp.com/tag/propaganda/) [Safety](https://www.techarp.com/tag/safety/) [Samsung](https://www.techarp.com/tag/samsung/) [Science](https://www.techarp.com/tag/science/) [Smartphone](https://www.techarp.com/tag/smartphone/) [Social media](https://www.techarp.com/tag/social-media/) [Software](https://www.techarp.com/tag/software/) [Twitter](https://www.techarp.com/tag/twitter/) [United States](https://www.techarp.com/tag/united-states/) [Vaccination](https://www.techarp.com/tag/vaccination/) [Vaccine](https://www.techarp.com/tag/vaccine/) [Video](https://www.techarp.com/tag/video/) [Virus](https://www.techarp.com/tag/virus/) Copyright © 2015-2026 by Dr. Adrian Wong. Proudly made in Malaysia\! [Go to mobile version](https://www.techarp.com/science/pfizer-vs-sinovac-child-vaccine/?amp=1) %d
Readable Markdown	Spread the love Now that both the Pfizer and Sinovac vaccines are approved for 5-11 year old kids, some parents are wondering – which is the better vaccine for their child? Here is a quick summary of both vaccines, as well as their safety and their efficacy against COVID-19\! ## Pfizer vs. Sinovac Child Vaccine : Different From Adult Vaccines? One of the first questions parents ask me is if the Pfizer and/or Sinovac vaccine for 5-11 year-old children are the same, as the adult vaccines. The Pfizer vaccine for 5-11 year old children is an improved formulation based on the adult vaccine, while the Sinovac vaccine is exactly the same for both adult and children. Here is a simple and quick comparison : \| \| \| \| \|---\|---\|---\| \| Characteristics \| Pfizer Vaccine for Kids \| Sinovac Vaccine for Kids \| \| Formulation \| Improved with Tris buffer More stable, longer storage \| No change \| \| No. of Doses \| 2 Doses No change \| 2 Doses No change \| \| Dosage \| 10 micrograms 1/3 of adult dose \| 3 micrograms Same as adult dose \| \| Volume \| 0\.2 ml 2/3 of adult vaccine \| 0\.5 ml Same as adult vaccine \| \| Dose Interval \| 8 Weeks \* 5 weeks longer \| 4 weeks Same as adult vaccine \| \* In some countries only, Pfizer still recommends the original 3-week dose interval ## Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child? Pfizer Child Vaccine Efficacy : 90\.7% The Pfizer bridging study showed that their lower-dose paediatric vaccine was 90\.7% efficacious in preventing symptomatic COVID-19 infection. Their study also showed that the Pfizer paediatric vaccine produced high neutralising antibody titres against the Delta (B.1.617.2) variant at 1 month after Dose 2. \| \| \| \| \|---\|---\|---\| \| One Month After Dose 2 \| Geometric Mean Titres (GMT) \| Difference \| \| USA-WA1/2020 (Reference) \| 365\.3 \| \+36.5X \| \| B.1.617.2 (Delta) \| 294\.9 \| \+29.5X \| \| Unvaccinated \| 10 \| Baseline \| Sinovac Child Vaccine Efficacy : Unknown Back in October 2021, the Malaysia Ministry of Health (KKM) ran a Phase 3 clinical trial to determine the efficacy of the Sinovac COVID-19 vaccine for children 3-11 years in age. However, they did not reveal what was the efficacy of the Sinovac COVID-19 vaccine for the 5-11 year old age group, or how it performed against the Omicron variant. We do know that the adult dose was only 50\.4% efficacious in preventing symptomatic COVID-19 from the original SARS-CoV-2 virus, and that it has [zero efficacy](https://www.techarp.com/science/pfizer-sinovac-omicron-study/) against the Omicron variant (see link and table below). It seems very improbable that the same vaccine would impart better efficacy in children, more so against the Delta or Omicron variants. Read more : [What HKU Study Revealed About Pfizer / Sinovac vs. Omicron](https://www.techarp.com/science/pfizer-sinovac-omicron-study/) \| \| \| \| \| \| \|---\|---\|---\|---\|---\| \| COVID-19 Variant \| Seropositive Rate \| MN Titer (GMT) \| \| \| \| Pfizer \| Sinovac \| Pfizer \| Sinovac \| \| \| HKU691 Omicron \| 20% \| 0% \| 5\.43 \| Min. \| \| HKU344-R346K Omicron \| 24% \| 0% \| 6\.42 \| Min. \| \| Delta \| 100% \| 68% \| 124\.7 \| 10\.3 \| \| Beta \| 100% \| 0% \| 25\.7 \| Min. \| \| Alpha \| 100% \| 100% \| 229\.4 \| 21\.7 \| Pfizer Is Definitely Better Than Sinovac For Your Child Until there are good peer-reviewed Phase 3 results of the Sinovac CoronaVac vaccine for 5-11 year-old children, I believe it is far more prudent to vaccinate your child with the [Pfizer COMIRNATY paediatric vaccine](https://www.techarp.com/science/pfizer-vaccine-kids-update/). At least the Pfizer paediatric COVID-19 vaccine has been proven in a Phase 3 trial to be 90\.7% efficacious in preventing symptomatic COVID-19 infections in 5-11 year-old children. It is highly unlikely that even the adult dose of the Sinovac vaccine can impart anything close to its original 50.4% efficacy against the ancestral COVID-19 virus, and it seems very likely to perform poorly against the Delta and Omicron variants. If you want the best protection for your child, get the new [Pfizer vaccine for kids](https://www.techarp.com/science/pfizer-vaccine-kids-update/). Only consider the Sinovac vaccine if your child has an adverse reaction to the first dose of the Pfizer vaccine. Read more : [Sinovac Vaccine for 5-11 Yo Kids : What You Need To Know\!](https://www.techarp.com/science/sinovac-5-11-yo-kids-vaccine/) Read more : [Pfizer COVID-19 Vaccine For Kids : What You Need To Know\!](https://www.techarp.com/science/pfizer-vaccine-kids-update/) ![Pfizer vs. Sinovac Vaccine : Which Is Better For Your Child?](https://i0.wp.com/www.techarp.com/wp-content/uploads/2022/03/Pfizer-vs-Sinovac-child-vaccine-comparison.jpg?resize=900%2C450&ssl=1) ## Pfizer vs. Sinovac Vaccine : Which Is Safer For Your Child? This is also another question that many parents are asking. Everyone is worried about COVID-19, but no one wants their child to be “injured” by a vaccine. There isn’t a straight answer, because safety has to be balanced against the risk of injury from a [breakthrough infection](https://www.techarp.com/science/covid-19-vaccine-breakthrough/) – getting COVID-19 despite being vaccinated. Sinovac Vaccine : Fewer Side Effects But Low Efficacy The Sinovac vaccine is no doubt a very safe vaccine, with fewer complaints of side effects. Generally, they include pain and swelling at the injection site, fever, headache, nausea, diarrhoea, joint pain, cough, chills, sore throat and runny nose. While parents will be relieved to hear that, I must point out that this is because the Sinovac vaccine generates a much weaker immune response. Even with an aluminium hydroxide adjuvant to boost the immune response, its efficacy is relatively poor at 50.4% against the original COVID-19 virus. Pfizer Vaccine : More Side Effects But Much Higher Efficacy The Pfizer vaccine is also a very safe vaccine, with rare risks of anaphylaxis and myocarditis in young adults and adolescents. The risk is not much higher than with other vaccines, as my table of data from the massive SAFECOVAC study shows : - Pfizer : 1 in every 1.11 million doses - AstraZeneca : 1 in every 1.43 million doses - Sinovac : 1 in every 2 million doses \| \| \| \| \| \|---\|---\|---\|---\| \| Age Groups \| Myocarditis Events (Per Million Doses) \| \| \| \| Pfizer \| AstraZeneca \| Sinovac \| \| \| Overall \| 0\.9 \| 0\.7 \| 0\.5 \| \| Over 30 Years \| 1\.0 \| NA \| 0\.6 \| \| 30 Years + Younger \| 0\.87 \| NA \| 0\.49 \| We must also remember that myocarditis is a condition that can affect anyone who suffers a viral infection, and is also seen with a COVID-19 infection. In fact, you are far more likely to get myocarditis from a COVID-19 infection than either the Pfizer or Sinovac vaccine. Here is my comparison of the myocarditis risk of triple vaccination (two doses + booster) versus a single COVID-19 infection. ![SAFECOVAC : Ultra-Low Myocarditis Risk From Vaccines\!](https://i0.wp.com/www.techarp.com/wp-content/uploads/2022/01/Myocarditis-COVID-19-comparison-SafeCOVAC.jpg?resize=545%2C320&ssl=1) \| \| \| \| \| \| \|---\|---\|---\|---\|---\| \| Myocarditis Risk \| Per Million People \| vs Sinovac \| vs AstraZeneca \| vs Pfizer \| \| COVID-19 \| 450 \| \+300x \| \+214x \| \+167x \| \| 3x Pfizer \| 2\.7 \| \+1.8x \| \+1.3x \| Baseline \| \| 3x AstraZeneca \| 2\.1 \| \+1.4x \| Baseline \| \-0.2x \| \| 3x Sinovac \| 1\.5 \| Baseline \| \-0.3x \| \-0.4x \| No matter how you slice and dice the results, it is very clear that the risk of myocarditis is GREATEST with a single COVID-19 infection, than it is with THREE doses of the Pfizer, AstraZeneca or Sinovac vaccines. If you are worried about your child getting myocarditis, you should definitely protect him/her using the best COVID-19 vaccine you can get, and that would be the Pfizer paediatric vaccine. ## Please Support My Work\! [![](https://i0.wp.com/www.techarp.com/wp-content/uploads/2021/04/Dr.-Adrian-Wong-small.jpg?resize=200%2C200&ssl=1)](https://www.techarp.com/articles/do-no-reject-vaccine-offered/attachment/dr-adrian-wong-small/)Support my work through a bank transfer / PayPal / credit card\! Name : Adrian Wong Bank Transfer : CIMB 7064555917 (Swift Code : CIBBMYKL) Credit Card / Paypal : <https://paypal.me/techarp> Dr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called Breaking Through The BIOS Barrier (ISBN 978-0131455368) while in medical school. He continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world. ## Recommended Reading - [Did Pfizer Try To Hide 158K Vax Adverse Events For 75 Years?](https://www.techarp.com/science/pfizer-158k-adverse-events/) - [Is Pfizer Vaccine Causing Japanese Encephalitis In Australia?\!](https://www.techarp.com/science/pfizer-japanese-encephalitis-facts/) - [Did Putin Humiliate Japan With His American Dog?\!](https://www.techarp.com/internet/putin-humiliate-japan-american-dog/) - [Did Pfizer Vaccine Documents Reveal 1,291 Side Effects?\!](https://www.techarp.com/science/pfizer-vaccine-1291-side-effects/) - [Is There Poison In COVID-19 Rapid Antigen Test Kits?\!](https://www.techarp.com/science/poison-rapid-antigen-test-facts/) ## Go Back To \> [Health](https://www.techarp.com/science/) \\| [Tech ARP](https://www.techarp.com/) ## Support Tech ARP\! Please support us by visiting our sponsors, participating in the [Tech ARP Forums](http://forums.techarp.com/), or [donating to our fund](https://www.techarp.com/events/tech-arp-server-upgrade-in-progress/#donation). Thank you\!
Shard	5 (laksa)
Root Hash	6550559042993769005
Unparsed URL	com,techarp!www,/science/pfizer-vs-sinovac-child-vaccine/ s443