Cases of a novel pneumonia-like viral illness that originated in Wuhan, China in December have now been confirmed in South Korea, Thailand, Japan, Taiwan, Macau, and the U.S. The virus' geographic reach, as well as...

Juul Labs, the e-cigarette company so popular its name became a verb, wouldn't be where it is without social media. In the company's early years, a steady stream of posts from users and influencers helped...

Flu season is always unpredictable. Different viral strains circulate each year, which makes forecasting the disease's spread—and formulating the annual flu vaccine—an educated guessing game. Even so, the 2019-2020 flu season has been particularly unusual....

Beyond its effects on the body, medical care can be a balm for the mind. Extensive treatment can feel like a promise that doctors have done everything possible. But that perceived security can come at...

After the Twin Towers fell on Sept. 11, 2001, the thousands of people involved in rescue-and-cleanup efforts were exposed to carcinogens and other toxins as they breathed in contaminated air and dug through industrial rubble....

It's become a virtually unchallenged piece of conventional wisdom that exposure to blue light—the type emitted by electronic device screens—is bad for sleep. That thinking has spurred a mini-industry of innovations meant to stop those...