Drug overdose deaths rose for the 11th straight year, federal data show, and most of them were accidents involving addictive painkillers despite growing attention to risks from these medicines.

You may not be a disease detective, but now you can play one at home.

About 1 in 9 younger women have used the morning-after pill after sex, according to the first government report to focus on emergency contraception since its approval 15 years ago.

Researchers have discovered the first U.S. cases of whooping cough caused by a germ that may be resistant to the vaccine.

A government study has fingered leafy green vegetables as the leading source of food poisoning illnesses.

A new strain of stomach bug sweeping the globe is taking over in the U.S., health officials say.

A new study shows New York City is doing better than Los Angeles in the battle against childhood obesity, at least for low-income children.

From the Rocky Mountains to New England, hospitals are swamped with people with flu symptoms. Some medical centers are turning away visitors or making them wear face masks, and one Pennsylvania hospital set up a tent outside its ER to deal with the feverish patients.