The nation's obesity epidemic continues to grow, led by an alarming increase among women. For the first time, more than 4 in 10 U.S. women are obese, according to new government health...

The nasal spray version of the annual flu vaccine failed to protect kids again last year, the latest in a string of failures that has prompted an expert panel to recommend that doctors stop giving it...

Warning: Looking at your smartphone while lying in bed at night could wreak havoc on your vision. Two women went temporarily blind from constantly checking their phones in the dark, say doctors...

The World Health Organization says women who live in areas where Zika is spreading should consider delaying pregnancy, since there's no other sure way to avoid the virus' devastating birth...

One doctor delivered test results to Prince's home. Another sent his son, who wasn't a physician, on a cross-country flight to bring medication to the music star. It's not clear if any doctor...

Up to 1 in 5 people may be dying unnecessarily from car crashes, gunshots or other injuries, a stark conclusion from government advisers who say where you live shouldn't determine if you survive. The...

Women infected with the Zika virus late in their pregnancies had babies with no apparent birth defects, according to a study in Colombia that seems to confirm that the greatest risk to infants comes...

Two new studies are offering some of the clearest snapshots yet of how babies build up protective gut bacteria, adding to evidence that antibiotics and birth by C-section may disrupt that...

Scientists say most antidepressants don't work for children or teenagers with major depression, some may be unsafe, and the quality of evidence about these drugs is so bad the researchers cannot be...

Countries committed to nearly doubling the number of people who receive life-saving HIV treatment over the next five years as a high-level United Nations conference devoted to ending the AIDS epidemic...