The U.S. government estimates that 80,000 Americans died of flu and its complications last winter -- the disease's highest death toll in at least four decades. 

The U.S. government estimates that 80,000 Americans died of flu and its complications last winter, the disease's highest death toll in at least four decades. 

New research calls into question what's in those IV bags that nearly every hospitalized patient gets. 

Continuing to play despite a concussion doubles recovery time for teen athletes and leads to worse short-term mental function than in those immediately removed from action, a study found.

An American couple has been confirmed to be among the 31 people killed in Tuesday's terror attacks in Brussels.