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URLhttps://www.statnews.com/2022/02/28/pfizer-covid-vaccine-kids-5-11/
Last Crawled2026-04-23 14:02:43 (18 hours ago)
First Indexed2022-02-28 17:52:34 (4 years ago)
HTTP Status Code200
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Meta TitlePfizer Covid vaccine is far less effective in kids 5 to 11, study finds
Meta DescriptionNew data suggest the Pfizer Covid vaccine works substantially less well at preventing infection and hospitalizations in kids 5 to 11.
Meta Canonicalnull
Boilerpipe Text
N ewly emerging data suggest the Pfizer-BioNTech Covid vaccine works substantially less well at preventing infection and hospitalizations in children aged 5 to 11 than it does in those aged 12 to 17 — a finding that is raising questions about whether the companies chose the wrong dose for the younger children. The data, from New York state, show a rapid and substantial decline in protection after vaccination in children in the younger age group, with efficacy against infections dropping off more quickly and dramatically than the declines seen in children aged 12 to 17. The study also found a significant, but less steep, decline in protection against hospitalizations. The findings , compiled by researchers working for the New York State Department of Health, were posted Monday on a preprint server; the study has not yet undergone peer review.
Markdown
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Test your knowledge with our new weekday mini crossword [Start solving](https://www.statnews.com/stat-mini-crossword/) [Health](https://www.statnews.com/category/health/) # Pfizer Covid vaccine is less effective in kids 5 to 11, study finds - ![Helen Branswell](https://www.statnews.com/wp-content/uploads/2021/02/helen-b-avatar-small2-80x80.png) By [Helen Branswell](https://www.statnews.com/staff/helen-branswell/)Feb. 28, 2022 [Reprints](https://www.parsintl.com/publications/stat/) ![](https://www.statnews.com/wp-content/uploads/2022/02/GettyImages-1236368686-645x645.jpg) A child wears a pin she received after receiving her first dose of the Pfizer Covid-19 vaccine. New research suggests the vaccine is less effective in kids ages 5 to 11 than in older adolescents. JEFF KOWALSKY/AFP via Getty Images Newly emerging data suggest the Pfizer-BioNTech Covid vaccine works substantially less well at preventing infection and hospitalizations in children aged 5 to 11 than it does in those aged 12 to 17 — a finding that is raising questions about whether the companies chose the wrong dose for the younger children. The data, from New York state, show a rapid and substantial decline in protection after vaccination in children in the younger age group, with efficacy against infections dropping off more quickly and dramatically than the declines seen in children aged 12 to 17. The study also found a significant, but less steep, decline in protection against hospitalizations. Advertisement [The findings](https://www.medrxiv.org/content/10.1101/2022.02.25.22271454v1.full.pdf), compiled by researchers working for the New York State Department of Health, were posted Monday on a preprint server; the study has not yet undergone peer review. ## About the Author [Reprints](https://www.parsintl.com/publications/stat/) ![Helen Branswell](https://www.statnews.com/wp-content/uploads/2021/02/helen-b-avatar-small2-80x80.png) ### [Helen Branswell](https://www.statnews.com/staff/helen-branswell/) Infectious Diseases Correspondent Helen Branswell covers issues broadly related to infectious diseases, including outbreaks, preparedness, research, and vaccine development. Follow her on [Mastodon](https://scicomm.xyz/@HelenBranswell) and [Bluesky](https://bsky.app/profile/helenbranswell.bsky.social). You can reach Helen on Signal at hbranswell.01. 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Readable Markdown
Newly emerging data suggest the Pfizer-BioNTech Covid vaccine works substantially less well at preventing infection and hospitalizations in children aged 5 to 11 than it does in those aged 12 to 17 — a finding that is raising questions about whether the companies chose the wrong dose for the younger children. The data, from New York state, show a rapid and substantial decline in protection after vaccination in children in the younger age group, with efficacy against infections dropping off more quickly and dramatically than the declines seen in children aged 12 to 17. The study also found a significant, but less steep, decline in protection against hospitalizations. [The findings](https://www.medrxiv.org/content/10.1101/2022.02.25.22271454v1.full.pdf), compiled by researchers working for the New York State Department of Health, were posted Monday on a preprint server; the study has not yet undergone peer review.
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Content Metadata
Languageen-us
AuthorHelen Branswell
Publish Time2022-02-28 17:50:14 (4 years ago)
Original Publish Time2022-02-28 17:50:14 (4 years ago)
RepublishedNo
Word Count (Total)942
Word Count (Content)139
Links
External Links19
Internal Links117
Technical SEO
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Meta NoarchiveNo
JS RenderedYes
Redirect Targetnull
Performance
Download Time (ms)863
TTFB (ms)849
Download Size (bytes)30,261
Shard126 (laksa)
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