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New Scan Finds Prostate Cancer Cells Hiding in the Body

Alaska Health Worker Had a Serious Allergic Reaction After Pfizer’s Vaccine

New At-Home Covid Test Gets Green Light From F.D.A.

Moderna Vaccine Is Highly Protective and Prevents Severe Covid-19, Data Show

Hearing Aids Could Use Some Help

Covid Study Shows an Arthritis Drug May Help Patients Recover

Fears of a ‘Twindemic’ Recede as Flu Lies Low

C.D.C. Panel Recommends Pfizer Vaccine for Patients as Young as 16

First Coronavirus Vaccines to Head to States, Starting Historic Effort

Amid Pandemic, Scientists Reassess Routine Medical Care

Pregnant and Breastfeeding Women May Opt to Receive the Vaccine

F.D.A. Clears Pfizer Vaccine, and Millions of Doses Will Be Shipped Right Away

F.D.A. Advisory Panel Gives Green Light to Pfizer Vaccine