They were passengers on a plane to Johannesburg with an infected Dutch woman who later died.

The virus is clearly far less contagious than the coronavirus, scientists agree, but they have found cases where it spread among people without direct contact.

It’s a nightmare faced by families all around Los Angeles: After wildfire smoke blanketed homes, schools and offices with toxic chemicals, when is it OK to go back?

Vice President JD Vance said the state had not done enough to fight fraud in the public health insurance program.

As the leader of the C.D.C.’s influenza division, she battled to keep up with an ever-changing viral opponent, building a global network of researchers and forecasters.

In a letter to President Trump, the spokesman, Rich Danker, said moves to allow the sale of flavored e-cigarettes would enhance their appeal to children.

In a dispute over vapes, the president sided with tobacco companies that filled his groups’ coffers over his own F.D.A. commissioner, who resigned in protest.

The agency’s top food official will step in as acting commissioner, after Dr. Makary’s tumultuous run as the nation’s top food, drug, tobacco and medical device regulator.

The new strategy also holds promise for lung and colon tumors. Here’s how scientists discovered it.

Influencers and health gurus are offering pregnancy solutions during “trimester zero,” when women are trying to conceive.

From the Trump administration to online influencers, the hormone is increasingly seen as the key to achieving a new male ideal.