Michaeleen Doucleff

It's no secret that many Americans have a fetish for big food. Whether it's a triple-decker cheeseburger or a 128-ounce Big Gulp, some portions in the U.S. have gotten freakishly large.

But not all of our supersizing is unhealthy.

Americans also like big fruit — especially grapes. And ...

Ever since a previously unknown virus killed a Saudi Arabian man last summer, scientists from around the globe have been trying to figure it out.

On Wednesday, two of the researchers who helped identify the virus shared fresh details about recent cases, including some ideas about how people catch it.

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A few months ago, we told you about a Peace Corps initiative that sends doctors and nurses abroad to teach and train local health workers — a sort of Peace Corps for Doctors.

They're not alone: Lots of health care professionals are now traveling abroad to help countries build ...

HIV has been declining in many parts of the world over the past decade. Today the U.S. unveiled an ambitious plan to stop most new HIV infections around the world. But some health lea...

The number of new HIV infections in the U.S. is relatively stable at about 50,000 people a year. But HIV is on the rise in people under 25, federal data show. The upswing is driven largely by infections among young black men.

Scientists have come up with an algorithm to guess how many stars a recipe will receive online. By building "social networks" for ingredients, the algorithms also reveal how we mix an...

A virus, which is genetically different than any seen before, has killed one man and hospitalized another. The virus comes from the same family as SARS, but it appears to be less contagious.

Since the World Health Organization reported an Ebola outbreak in Uganda on Saturday, the number of cases has risen to 36 from 20. The cases remain limited to a small area in western ...