Fans and foes want to know whether the Affordable Care Act is meeting its goals. But, for good reasons, there are no clear answers yet.

Scientists have figured out one reason why women might be more vulnerable to Alzheimer's. A risk gene doubles women's chances of getting the disease but has minimal effect on men.

Recent studies indicate women in more remote areas are less likely to learn of their reconstruction options.

They have recovered from the deadly virus that is ravaging Guinea. They feel blessed by their good fortune. But family and friends are often afraid to welcome them back with open arms.

Researchers ignited a debate three years ago when they changed a deadly flu virus so that it could spread between people. Only five mutations are needed to turn the virus into a pandemic threat.

Fresh figures show that a relatively small number of doctors receive a significant share of Medicare payments. But analysts warn against jumping to conclusions about what that means.

More funding for in-person guidance could help ease confusion, say consumer groups. Beefing up education about each plan's relative costs would help, as would shifting open enrollment to tax-time.

Two-thirds of older adults suffer from cognitive impairment or dementia in their last year of life, a study finds. That fact and being cared for at home increase the risk of aggressive treatment.

It's easy to think that a shaking hand could be caused by Parkinson's disease. But it's more likely essential tremor, an ailment that's not life threatening but can become debilitating.

The government has reported 42 percent fewer foodborne illness cases in the last decade and solved less than half of them, a report finds. But that doesn't necessarily mean the food supply is safer.