The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

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 ...

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

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 ...

Flu cases are surging this winter—this season is no joke. New data from the Centers for Disease Control and Prevention ...

Testing results from patients indicate that two strains of seasonal flu that are causing most illnesses — a Type A H1N1 and a ...

In today’s Health Alert, flu cases are on the rise, and Michigan is seeing very high flu activity, according to CDC data.