One type mutates often and causes seasonal pandemics. The other one doesn't. Here's what else is different.

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in New Jersey, symptoms, more.

Feeling under the weather? You could have Influenza Type A. Here's the difference between Influenza Type A and Type B.

Seasonal influenza activity has elevated in California due to a "super flu" strain that has resulted in higher confirmed flu ...

All viral activity benchmarks have gone down, except for a slight increase in the death rate. Here's what to know about the state of the flu season.

Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...

The U.S. is facing its worst flu season in 25 years, according to the Centers for Disease Control and Prevention, which ...

Flu is rising rapidly across the U.S., driven by a new variant of the virus. The Centers for Disease Control and Prevention reported Tuesday that after a slow start to flu season in early December, ...