The short-term effectiveness of coronavirus disease 2019 (COVID-19) vaccines among healthcare workers: a systematic literature review and meta-analysis.
Alexandre Rodrigues MarraTakaaki KobayashiHiroyuki SuzukiMohammed AlsuhaibaniBruna Marques TofanetoLuigi Makowski BarianiMariana de Amorim AulerJorge L SalinasMichael B EdmondJoão Renato Rebello PinhoLuiz Vicente RizzoMarin L SchweizerPublished in: Antimicrobial stewardship & healthcare epidemiology : ASHE (2021)
The COVID-19 mRNA vaccines are highly effective against symptomatic COVID-19, even with 1 dose. More observational studies are needed to evaluate the vaccine effectiveness of other COVID-19 vaccines, COVID-19 breakthrough after vaccination, and vaccine efficacy against new variants.