Without access to health care, undocumented immigrants turn to expensive, unproven cures.

BY AMY MAXMEN | NYTimes Health | Disclosure

Why make a virus more transmissible? To learn how to fight it.

BY CARL ZIMMER AND JAMES GORMAN | NYTimes Health | Disclosure

Wondering if the Vaccine Worked? Get the Right Test, at the Right Time

Scientists generally recommend against antibody testing after vaccination. But for some people, it makes sense.

By APOORVA MANDAVILLI | NYTimes Health | Disclosure

Some people should get antibody tests after vaccination. You’re probably not one of them.

BY APOORVA MANDAVILLI | NYTimes Health | Disclosure

Brazil reported one of the highest Covid death tolls in the world.

BY REED ABELSON | NYTimes Health | Disclosure

Wondering if the Vaccine Worked? Get the Right Test, at the Right Time

BY APOORVA MANDAVILLI | NYTimes Health | Disclosure

Without access to health care, undocumented immigrants are turning to expensive, unproven cures.

BY AMY MAXMEN | NYTimes Health | Disclosure