Katz MA, Harlev EB, Chazan B, Chowers M, et al. Early effectiveness of BNT162b2 Covid-19 vaccine in preventing SARS-CoV-2 infection in healthcare personnel in six Israeli hospitals (CoVEHPI). Vaccine 2021 Dec 10. pii: S0264-410X(21)01580.
PMID: 34903372