Health

Tiny genetic alterations could help the bird flu virus enter cells in the upper respiratory tract, the C.D.C. said. But there is no sign that mutations are widespread in nature.

Shuttered drugstores pose a particular threat to older adults, who take more medications than younger people and often rely on pharmacies for advice.

The U.S. provides nearly half of the aid for global health, including childhood vaccination, H.I.V. treatment and disease surveillance.

The Food and Drug Administration released final rules on labeling foods as “healthy,” tightening limits for sugar, sodium and saturated fat.

Dr. Mark Hyman, a “functional medicine” proponent and longtime friend of Robert F. Kennedy Jr., is finding powerful allies in his bid to treat disease with blood tests and supplements.

The astronauts on the I.S.S. — including two who were scheduled to return months ago — held a zero-gravity cookie-decorating contest and built a reindeer from storage bags.

Our reporter went to Congo, where the mpox epidemic has reached the teeming capital, infecting children and their mothers, who sell sex to survive.

Attempts to restrict pharmaceutical advertisements have failed many times over the years, often on First Amendment grounds.

A mutant gene is coming to steal Linde Jacobs’s mind. Can she find a way to stop it?