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For toddlers, the risk is in taking a fall. Teenagers need to worry about car accidents, sports injuries and assault. Knowing how risks change can help prevent fatal or disabling brain injuries.

The hospital in Liberia was erected this summer in a field. It has 250 beds. It was full as recently as October. Now it is nearly empty.

Almost 1 million people a year end up with painful eye infections, and improper contact lens care is a big reason why, according to a new study from the CDC.

Over-the-counter remedies can help a lot if your stuffy, drippy nose is caused by allergies, new guidelines say. Acupuncture might help, too, but there's no evidence that herbal remedies do a thing.

Think expedition to the rain forest, but one where you'll need a MetroCard to get around. The microbial life of the New York subways turns out to be as rich, odd and confounding as the city itself.

An agreement between the Tennessee Hospital Association and Republican Gov. Bill Haslam expands Medicaid without tax dollars, an agreement that could be a blueprint for other states.

Humans are notoriously bad at remembering exactly how much we eat and exercise, yet researchers often ask. A new paper says self-reported data have skewed hundreds of studies and must be discontinued.

The vaccine is only about 23 percent effective against the dominant flu strain, according to the Centers for Disease Control and Prevention. That's because the strain mutated slightly.

Hospitals are notoriously difficult places to sleep, despite efforts to make them less noisy. Cheap, simple workarounds can help, a study says. Taking the sleep hormone melatonin helped the most.

Scientists say they've identified the bacteria that emit that rank smell after a hard workout. Future deodorants might target that bad actor rather than blocking sweat glands or nuking all bacteria.