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 ...

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. Here's what to know about the two most ...

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

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

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

Cold and flu may seem alike, but knowing their key differences can prevent serious health risks. Learn how to recognize and ...

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 ...