Male teens with conduct disorder may have a dampened physical response to stress, a British study shows.

Consumer groups and medical experts called on the FDA to pull children's cough and cold medications off the market or make them available only by prescription.

Twice as many uninsured people in the U.S. will have health insurance in 10 years under Sen. Barack Obama's health care plan than under Sen. John McCain's plan, according to a report by the health care research group The Commonwealth Fund.

An Environmental Working Group report on certain chemicals in cosmetics and body care products is raising eyebrows, with the nonprofit group sounding the alarm and the cosmetics industry standing by cosmetics' safety.

CDC: 1.1 million Americans had HIV in 2006 -- up 11% from 2003. 46% are African-American.

When delinquent mortgages tripled in Kern County, Calif., mosquitoes swarmed in neglected swimming pools -- and West Nile virus cases surged 276% in 2007.

Curbing inflammation in a brain region called the hypothalamus may help prevent obesity, lab tests on mice show.