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Drug-Resistant Bacteria Tied to Eyedrops Can Spread Person to Person

U.S. Health Officials Urge Vigilance as Ebola Spreads in Uganda

F.D.A. advisers will weigh in on Covid shots by Novavax, a latecomer in the vaccine race.

The Novavax vaccine, backed by Operation Warp Speed, has won its first authorization — in Indonesia.

Novavax Offers U.S. a Fourth Strong Covid-19 Vaccine

A Glut of Chinese Masks Are Driving U.S. Companies Out of Business

Pandemic Forces F.D.A. to Sharply Curtail Drug Company Inspections

States Complain of Smaller Vaccine Shipments Than Expected

The Vaccines Will Probably Work. Making Them Fast Will Be the Hard Part.

These Scientists Raced to Find a Covid-19 Drug. Then the Virus Found Them.