Observational studyThe Lancet. Infectious diseases2023
Initial protection against SARS-CoV-2 omicron lineage infection in children and adolescents by BNT162b2 in Israel: an observational study.
Observational study in The Lancet. Infectious diseases, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 3 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
7 citing papers in PubMed, 3 syntheses or guidelines pooled it, 14 citations in OpenAlex.
- The effect of COVID-19 vaccine to the Omicron variant in children and adolescents: a systematic review and meta-analysis.Frontiers in public health · 2024Pooled it
- Effectiveness of COVID-19 Pfizer-BioNTech (BNT162b2) mRNA vaccination in adolescents aged 12-17 years: A systematic review and meta-analysis.Human vaccines & immunotherapeutics · 2023Pooled it
- Safety and effectiveness of vaccines against COVID-19 in children aged 5-11 years: a systematic review and meta-analysis.The Lancet. Child & adolescent health · 2023Pooled it
- Article
- COVID-19 Disease in Under-5 Children: Current Status and Strategies for Prevention including Vaccination.Vaccines · 2023Review
- Effectiveness of the BNT162b2 vaccine in preventing morbidity and mortality associated with COVID-19 in children aged 5 to 11 years: A systematic review and meta-analysis.PLOS global public health · 2023Article
- On-Site Quantification and Infection Risk Assessment of Airborne SARS-CoV-2 Virus Via a Nanoplasmonic Bioaerosol Sensing System in Healthcare Settings.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
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Authors and funding
10 authors at 6 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe BNT162b2 (Pfizer-BioNTech) two-dose vaccine regiment for children and the BNT162b2 third dose for adolescents were approved shortly before the SARS-CoV-2 omicron (B.1.1.529) outbreak in Israel. We aimed to estimate the effects of these vaccines on the rates of confirmed infection against the omicron variant in children and adolescents.
methodsIn this observational cohort study, we extracted data for the omicron-dominated (sublineage BA.1) period. We compared rates of confirmed SARS-CoV-2 infection between children aged 5-10 years 14-35 days after receiving the second vaccine dose with an internal control group of children 3-7 days after receiving the first dose (when the vaccine is not yet effective). Similarly, we compared confirmed infection rates in adolescents aged 12-15 years 14-60 days after receiving a booster dose with an internal control group of adolescents 3-7 days after receiving the booster dose. We used Poisson regression, adjusting for age, sex, socioeconomic status, calendar week, and exposure.
findingsBetween Dec 26, 2021, and Jan 8, 2022, we included 1 158 289 participants. In children aged 5-10 years, the adjusted rate of confirmed infection was 2·3 times (95% CI 2·0-2·5) lower in children who received a second dose than in the internal control group. The adjusted infection rate in children who received a second dose was 102 infections per 100 000 risk-days (94-110) compared with 231 infections per 100 000 risk-days (215-248) in the corresponding internal control cohort. In adolescents aged 12-15 years, the booster dose decreased confirmed infection rates by 3·3 times (2·8-4·0) compared with in the internal control group. The adjusted infection rate of the booster cohort was 70 per 100 000 risk-days (60-81) compared with 232 per 100 000 risk-days (212-254) in the internal control cohort.
interpretationA recent two-dose vaccination regimen with BNT162b2 and a recent booster dose in adolescents substantially reduced the rate of confirmed infection compared with the internal control groups. Future studies are needed to assess the duration of this protection and protection against other outcomes such as paediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 and long-COVID.
fundingNone.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.