Michaeleen Doucleff

For the past 10 years, doctors have used a genetic test to decide which patients may be able to skip chemotherapy after surgery for breast cancer.

Now a study confirms that this test, called Oncotype DX, works well for a small group of patients. But a longer, follow-up study is ...

Scientists have found that working in one's 60s and 70s is associated with better physical and mental health. Even part-time work may be enough to reap the benefits.

It's called the Heartland virus disease. Since it was first detected in 2009, there have been only nine reported cases in the Midwest, including two deaths.

So scientists thought the Heartland virus was limited to a small region.

That assumption was wrong.

A team at the Centers for Disease Control ...

At first glance, the metallic device almost looks like a high-tech bike pedal. Or maybe the latest cooking gadget for zesting lemons. Or, perhaps, it's a secret weapon for X-Men superhero Wolverine.

But look again.

Doctors in Spain say this is the world's first 3-D-printed rib cage, made entirely ...

If a venomous snake bites you in Africa, you're likely to survive when you're near a hospital. That might not be the case next year.

Teenagers aren't always risk-taking gamblers; they put a lot of effort into weighing financial choices, a study finds. Adults are more apt to adopt rules and quickly make choices that are good enough.

These are the tiniest babies born. Some weigh only a pound or two. And can fit in the palm of your hand.

Extreme preemies — born somewhere between 22 and 28 weeks — have a better chance of surviving now than they did 20 years ago, doctors report Tuesday ...

Hospital admissions caused by bike injuries have more than doubled in the past 15 years across the country. One doctor thinks the "Lance Armstrong effect" could be a reason for the jump.

The Ebola epidemic has entered a new phase. And it's a good one.

For the first time since the virus hit Sierra Leone, the country hasn't had a single new case in a week, the World Health Organization said Wednesday.

And over in Guinea and Liberia, the situation is ...

The yeast produce only tiny amounts of the drug. But eventually, the technology could lead to better painkillers and other medicines. Drug officials worry the microbes could fall into the wrong hands.

It goes by many names: Delhi belly. Montezuma's revenge. The Aztec two-step. But doctors use one not-so-glamorous term: traveler's diarrhea.

If you're visiting a place this summer with less than ideal sewage disposal — maybe a resort in Mexico or a village in Rajasthan — chances are your GI tract ...

It has many names: Montezuma's Revenge. Delhi Belly. But the things that keep you healthy here (like washing your hands) turn out not to be that helpful against traveler's diarrhea. Here's what is.

In a small trial, an experimental vaccine protected 100 percent of people at high risk for Ebola. But more data are needed to figure out exactly how well the vaccine works.

Only six people in the world know how to do what Sergio Pacheco is about to do.

A middle-aged man who rarely smiles, Pacheco stands in the middle of a crowd on the National Mall, wearing a feathered headdress, beaded necklace and wrinkled dress that's been hand painted with a ...

It's about the size of an "energy shot." You take it just like a shot of whiskey — bottoms up.

But this little ounce-and-a-half of liquid is more potent than caffeine or alcohol.

It's a cheap, oral vaccine against cholera. It could prevent deadly outbreaks, like the current one in ...

No matter where you travel around the world, people share a few qualities. They cherish love for families and friends. They unite around good cooking. And they make music you can shake your booty to.

"Music is the universal language of mankind," Henry Wadsworth Longfellow wrote in first major work, ...

Liberia has gone several months without a case of Ebola, but this week, health officials announced two new cases.

Almost two months after Liberia was declared Ebola-free, the disease has cropped up again — this time in a rural town outside the capital city.

So far, there's only one new case, but health officials are rushing to stop its spread.

Liberia's deputy health minister, Tolbert Nyenswah, said Tuesday that ...

Compared to other cultures around the world, Americans are big stoners.

About 40 percent of Americans say they've tried marijuana at some point in their lifetimes, a large survey found. That rate was the highest reported across 17 countries, and it's nearly 10 times higher than the global average.

...

An outbreak of the Middle East respiratory syndrome, or MERS, has swelled to 95 cases in South Korea. Seven people have died, and scientists are trying to figure why the outbreak has grown so rapidly.

Although there's no vaccine or treatment for MERS, the disease isn't usually very contagious.

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