The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

As we get deeper into flu season, a new type of the influenza virus has been identified, the Centers for Disease Control and ...

Flu symptoms can be mild or severe, but they usually come on quickly, according to the CDC.

The U.S. flu season is starting slowly, and it’s not clear if it will be as bad as last winter’s. But some health experts are ...

Infectious disease doctors break it down.

Michigan's chief medical executive says the vaccine 'reduces severe complications' of the flu, including hospitalization.

With a new flu virus variant circulating, scientists fear more sickness this winter. The vaccine may be slightly less ...

This year's version of H3N2 has experts on alert. It's a mutated version, subclade K, that may weaken the vaccine's ...