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

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 ...

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

While we often refer to it as "the flu," the influenza virus has several strains. Here's what to know about the two most ...

Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals. But not all influenza is the same. There are some notable differences between flu A and flu B strains. On ...

Influenza A is further divided into subtypes. You may have heard of H1N1 or H3N2 – those are the two dominant types of influenza A circulating right now, according to the CDC. “Influenza A ...