Virus Variant in Brazil Infected Many Who Had Already Recovered From Covid-19

BY CARL ZIMMER | NYTimes Health | Disclosure

High Staff Turnover at U.S. Nursing Homes Poses Risks for Residents’ Care

BY REED ABELSON | NYTimes Health | Disclosure

A Covid Vaccine Side Effect, Enlarged Lymph Nodes, Can Be Mistaken for Cancer

BY DENISE GRADY | NYTimes Health | Disclosure

In Quest for Herd Immunity, Giant Vaccination Sites Proliferate

BY ABBY GOODNOUGH AND CHRISTOPER CAPOZZIELLO | NYTimes Health | Disclosure

F.D.A. Clears Johnson & Johnson’s Shot, the Third Vaccine for U.S.

BY NOAH WEILAND AND SHARON LAFRANIERE | NYTimes Health | Disclosure

Vulnerable Inmates Left in Prison as Covid Rages

BY RONI CARYN RABIN | NYTimes Health | Disclosure

F.D.A. Expert Panel Endorses Johnson & Johnson’s Vaccine

BY CARL ZIMMER AND NOAH WEILAND | NYTimes Health | Disclosure