WASHINGTON (AP) -- New research further debunks any link between measles vaccine and autism, work that comes as the nation is experiencing a surge in measles cases fueled by children left unvaccinated.

CHICAGO (AP) -- Brisk walking led to slight improvements on mental tests for older people with memory problems in what is billed as the first rigorous test of exercise on the aging brain. The results from the small Australian study were only modest. But they back up observational studies showing potential mental benefits from physical activity.

(USA TODAY) -- Cases of chickenpox -- a disease that was once nearly universal -- have fallen 57% to 90% in communities across the USA since a vaccine was introduced in 1995, a new report shows.

MUNICH, Germany (AP) -- Fish oil supplements may work slightly better than a popular cholesterol-reducing drug to help patients with chronic heart failure, according to new research released Sunday.