Effectiveness of Inactivated COVID-19 Vaccination Against COVID-19-Related Hospitalization and Severe Outcomes in Adults ≥80 Years During Omicron Circulation in Beijing, China: Retrospective Cohort Study
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Background: A large wave of COVID-19 caused by SARS-CoV-2 Omicron subvariants began in Beijing in early December 2022. Objective: This study ai... ...
