The fall COVID-19 vaccine season is starting slowly for Pfizer, with U.S. sales of its Comirnaty shots sinking 25% after federal regulators narrowed recommendations on who should get them

The Food and Drug Administration is restricting the use of fluoride supplements used to strengthen children’s teeth

Nature walks are good for you, but can a city stroll be just as good

Researchers followed more than 85,000 adults in the U.K. for about seven years.

A new study suggests walking just 4,000 steps a day could be enough to lower one's risk of death by up to 40%.

An outbreak of hand, foot, and mouth disease has hit one county in Tennessee, affecting 31 schools and child care centers and sickening at least 178 children and staff.

ABC News medical contributor Dr. Alok Patel delivers a look-back at this week’s top medical headlines.

As the federal government shutdown enters its tenth day, one major health care issue has continued to be a sticking point: insurance subsidies.

The Washington Post is reporting that the Trump administration is planning to link autism to the use of Tylenol in pregnancy. The maker of Tylenol is pushing back on the claims.

ABC News’ Jonathan Karl interviews Robert Wood Johnson Foundation President and CEO and former acting CDC Director Dr. Richard Besser on “This Week.”

The CDC data means an estimated 8.4 million young people -- or 32.7% of the U.S. adolescent population -- had prediabetes in 2023, the most recent data available.