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

Data from the Centers for Disease Control and Prevention shows seasonal flu activity continues to increase across the country ...

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 ...

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

New Mexico, Texas and Nebraska are among the states with the highest number of people showing flu-like symptoms.

What does it mean to have flu A or flu b this season, and do these types of flu have the same symptoms? Here's what to know about the flu viruses. This pie chart shows the number of flu cases ...

But what does it mean to have a flu A or flu B season? Do these types of flu have different symptoms? And does one cause more severe illness than the other? Experts have been studying influenza ...