Protection afforded by post-infection SARS-CoV-2 vaccine doses: A cohort study in Shanghai.

ABSTRACT:

Background

In many settings, a large fraction of the population has both been vaccinated against and infected by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Hence, quantifying the protection provided by post-infection vaccination has become critical for policy. We aimed to estimate the protective effect against SARS-CoV-2 reinfection of an additional vaccine dose after an initial Omicron variant infection.

Methods

We report a retrospective, population-based cohort study performed in Shanghai, China, using electronic databases with information on SARS-CoV-2 infections and vaccination history. We compared reinfection incidence by post-infection vaccination status in individuals initially infected during the April-May 2022 Omicron variant surge in Shanghai and

SUBMITTER: Zheng B 

PROVIDER: S-EPMC11832167 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature