Flu activity continues to hit new peaks, spreading across the country, according to data from the Centers for Disease Control and Prevention.

Doctor visits for flu symptoms are at a 15-year high. Why is this flu season so bad? Doctors discuss flu trends, symptoms and ...

Both are covered in this year's flu vaccine, but only about 40 percent of Americans have taken the vaccine each of the last ...

Bird flu cases are still rising in the U.S. as the virus continues to devastate poultry farms. More than 145 million chickens, ducks, turkeys and other fowl have been slaughtered across the United ...

Flu cases were “high” or “very high” in 45 states and jurisdictions for the week ended Feb. 1. See how Florida fared.