Experts in healthy aging often cite the importance of leisure activities -- hanging out with friends, playing games, taking classes -- in maintaining your brain health as you grow older.

But a new study calls into question whether those enjoyable pursuits actually protect you against dementia.

Researchers found no link between middle... Full Page

Jill Veach looked at the name on her chirping phone.

The caller was her longtime babysitter. It was midafternoon, around the time Jill's husband, Matt, would have picked up their children – Claudia, 8, and Vinnie, 4 – from the babysitter's home. Matt must have left something there, Jill thought before answering.

"Jill, I'm not tr... Full Page

Many women have depression symptoms after giving birth, but for some postpartum depression hangs on for years, a U.S. government study finds.

Of nearly 4,900 new mothers researchers followed, one-quarter had depression symptoms at some point in their child's first three years. And for about half of them, the symptoms either started early ... Full Page

Long-term exposure to air pollution is tied to an increased risk of dying from COVID-19, a new study finds.

About 15% of deaths from COVID-19 worldwide could be due to long-term exposure to air pollution, the researchers said. In Europe, the proportion was about 19%, in North America about 17% and in East Asia about 27%.

These propor... Full Page

America's leading infectious diseases expert called for a national mask mandate on Wednesday as coronavirus cases surged across the country.

After expressing regret that face masks haven't been more widely adopted, Dr. Anthony Fauci said for the first time on Wednesday that the United States needs a nationwide mask mandate to combat the ri... Full Page

Which type of COVID-19 test is best?

There are three types of COVID-19 tests. The molecular test, known as the PCR -- short for polymerase chain reaction - is considered the most accurate, particularly when taken deep in the nasal cavity.

"The sensitivity of the test is much better when you get that deeper specimen," said Dr. Cathari... Full Page