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

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

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

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

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 flu vaccine is developed using data monitored from around the world to predict what the most common strain will be. The ...

Two subtypes are typically at play each flu season: influenza type A and influenza type B. Data from the Centers for Disease Control and Prevention show that seasonal flu activity continues to ...