Sorry, clean freaks. No matter how well you scrub your home, it's covered in bacteria from your own body. And if you pack up and move, new research shows, you'll rapidly transfer your unique...

New research suggests a one-two punch could help battle polio in some of the world's most remote and conflict-torn regions: Giving a single vaccine shot to children who've already swallowed...

Two American aid workers have recovered from Ebola and left an Atlanta hospital, after weeks of intensive treatment in a special isolation unit.   They were first two Ebola patients ever...

Doctors and nurses fighting Ebola in West Africa are working 14-hour days, seven days a week, wearing head-to-toe gear in the heat of muddy clinics. Agonizing death is the norm. The hellish conditions...

An experimental drug saved monkeys from a virus closely related to Ebola even after symptoms began, Texas researchers reported Wednesday. A drug that targets Ebola in the same way is under...

A scary problem lurks beyond the frenzied efforts to keep people from spreading Ebola: No one knows exactly where the virus comes from or how to stop it from seeding new outbreaks.   Ebola...

The United States' top disease detective calls Ebola a "painful, dreadful, merciless virus."   The World Health Organization has declared the outbreak in West Africa an...

A large international study questions the conventional wisdom that most people should cut back on salt, suggesting that the amount most folks consume is OK for heart health — and too little may...

A U.S. government scientist kept silent about a potentially dangerous lab blunder and revealed it only after workers in another lab noticed something fishy, according to an internal...

At some point, children quit counting your fingers and just know the answer. Now scientists have put youngsters into brain scanners to find out why, and watched how the brain reorganizes itself as...