The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

(Photo Credit: E+/Getty Images) Three types of flu viruses affect humans: types A, B, and C. Type A and B cause the annual influenza epidemics that have up to 20% of the population sniffling ...

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the ...

This latest outbreak is part of a broader epizootic that has swept across the United States, affecting not only poultry but ...