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

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

Influenza A, B, C Or D? Flu spreads easily in winter due to crowded indoor spaces, low humidity, and reduced immunity.

While we often refer to it as "the flu," the influenza virus has several strains, with flu A and flu B considered the most ...

Flu season is starting to tick up in the U.S. And, looking at clues from other countries, we may be in for a rough winter. But not all influenza is the same. And there are some notable differences ...

Vaccines still are effective in decreasing the possibility of hospitalization associated with this season's "super flu," ...

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