Effectiveness of BNT162b2 Vaccine against Omicron Variant Infection among Children 5-11 Years of Age, Israel

Aharona Glatman-Freedman; Yael Hershkovitz; Rita Dichtiar; Alina Rosenberg; Lital Keinan-Boker; Michal Bromberg

doi:10.3201/eid2904.221285

Effectiveness of BNT162b2 Vaccine against Omicron Variant Infection among Children 5-11 Years of Age, Israel

Aharona Glatman-Freedman, Yael Hershkovitz, Rita Dichtiar, Alina Rosenberg, Lital Keinan-Boker, Michal Bromberg

School of Public Health

Research output: Contribution to journal › Article › peer-review

Abstract

We assessed effectiveness of the BNT162b2 vaccine against infection with the B.1.1.529 (Omicron) variant (mostly BA.1 subvariant), among children 5-11 years of age in Israel. Using a matched case-control design, we matched SARS-CoV-2-positive children (cases) and SARS-CoV-2-negative children (controls) by age, sex, population group, socioeconomic status, and epidemiologic week. Vaccine effectiveness estimates after the second vaccine dose were 58.1% for days 8-14, 53.9% for days 15-21, 46.7% for days 22-28, 44.8% for days 29-35, and 39.5% for days 36-42. Sensitivity analyses by age group and period demonstrated similar results. Vaccine effectiveness against Omicron infection among children 5-11 years of age was lower than vaccine efficacy and vaccine effectiveness against non-Omicron variants, and effectiveness declined early and rapidly.

Original language	English
Pages (from-to)	771-777
Number of pages	7
Journal	Emerging Infectious Diseases
Volume	29
Issue number	4
DOIs	https://doi.org/10.3201/eid2904.221285
State	Published - Apr 2023

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© 2023 Centers for Disease Control and Prevention (CDC). All rights reserved.

ASJC Scopus subject areas

Epidemiology
Microbiology (medical)
Infectious Diseases

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3201/eid2904.221285

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title = "Effectiveness of BNT162b2 Vaccine against Omicron Variant Infection among Children 5-11 Years of Age, Israel",

abstract = "We assessed effectiveness of the BNT162b2 vaccine against infection with the B.1.1.529 (Omicron) variant (mostly BA.1 subvariant), among children 5-11 years of age in Israel. Using a matched case-control design, we matched SARS-CoV-2-positive children (cases) and SARS-CoV-2-negative children (controls) by age, sex, population group, socioeconomic status, and epidemiologic week. Vaccine effectiveness estimates after the second vaccine dose were 58.1% for days 8-14, 53.9% for days 15-21, 46.7% for days 22-28, 44.8% for days 29-35, and 39.5% for days 36-42. Sensitivity analyses by age group and period demonstrated similar results. Vaccine effectiveness against Omicron infection among children 5-11 years of age was lower than vaccine efficacy and vaccine effectiveness against non-Omicron variants, and effectiveness declined early and rapidly.",

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AU - Hershkovitz, Yael

AU - Dichtiar, Rita

AU - Rosenberg, Alina

AU - Keinan-Boker, Lital

AU - Bromberg, Michal

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Effectiveness of BNT162b2 Vaccine against Omicron Variant Infection among Children 5-11 Years of Age, Israel

Abstract

Bibliographical note

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UN SDGs

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