Families claiming that a mercury-based preservative in vaccines triggers autism will challenge mainstream medicine Monday as they take their case to a federal court.

Depression, teens and marijuana are a dangerous mix that can lead to dependency, mental illness or suicidal thoughts, according to a White House report being released Friday.

Flu vaccine manufacturers expect to make a record number of doses for next flu season despite concerns that demand may drop because this year's vaccine was largely ineffective.

The United States is offering to help China in its fight against a viral infection that has killed 34 children, including two reported Friday, and sickened thousands of others.

Seventy-seven more people who were treated at a Las Vegas outpatient clinic have been diagnosed with hepatitis C, health officials said.

South Korea says it will double its stockpile of the antiviral drug Tamiflu as bird flu spreads among poultry across the country.

There's a grim, rarely talked-about twist to all that medical know-how doctors learn to save lives: It makes them especially good at ending their own. An estimated 300 to 400 U.S. doctors kill themselves each year — a suicide rate thought to be higher than in the general population, although exact figures are hard to come by.

More than half of U.S. adults with diabetes also have arthritis, raising a serious obstacle for diabetic patients urged to exercise, according to a government study.

The federal government's new advice to doctors for helping smokers quit recommends the drug Chantix, which has recently been linked with depression and suicidal behavior. The new guidelines mention the psychiatric risks but also say the popular Pfizer Inc. drug is the most effective at helping people get off cigarettes.

Seven-time Tour de France winner and cancer survivor Lance Armstrong is calling on Congress to renew the nation's war on cancer.