Association Between Vaccination With BNT162b2 and Incidence of Symptomatic and Asymptomatic SARS-CoV-2 Infections Among Health Care Workers

Retrospective study of healthcare workers in Israel (n=6710) found Pfizer-BioNTech Covid-19 vaccine was associated with lower incidence of symptomatic (4.7 v 149.8 per 100 000 person-days) and asymptomatic (11.3 vs 67.0 per 100 000 person-days) infection >7 days after second dose

Journal of the American Medical Association