Effectiveness of Messenger RNA Coronavirus Disease 2019 (COVID-19) Vaccines Against Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection in a Cohort of Healthcare Personnel.

Swift, Melanie D; Breeher, Laura E; Tande, Aaron J; Tommaso, Christopher P; Hainy, Caitlin M; Chu, Haitao; Murad, M Hassan; Berbari, Elie F et al. · Clin Infect Dis · 2021

prospective_cohort · Level II

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Abstract

In a large cohort of United States healthcare personnel without prior coronavirus disease 2019 (COVID-19) infection, 94 382 doses of messenger RNA (mRNA) COVID-19 vaccine were administered to 49 220 individuals. The adjusted vaccine effectiveness following 2 doses of each of the 2 available brands of mRNA vaccine exceeded 96%.

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