BNT162b2 mRNA Covid-19 Vaccine Effectiveness among Health Care Workers

Single centre retrospective study (n=6,680) found a major reduction in new cases of COVID-19 (32.1 to 4.4 per 1000 workers from weeks 1 to 5) in those who had two doses of the Pfizer vaccine, even when a surge of the B.1.1.7 variant was noted in up to 80% of cases.

New England Journal of Medicine