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.

Justice Samuel A. Alito Jr. has paused until at least Thursday a federal appeals court ruling against the Food and Drug Administration that would restrict access by mail to mifepristone.

The last evacuees disembarked in the Canary Islands, and a smaller crew is now en route to Rotterdam, where the ship will be disinfected, officials said.

Health Secretary Robert F. Kennedy Jr. has toned down his public criticism of vaccines, under orders from the White House. But inside his department, a sprawling research effort is a top priority.