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 ...

Influenza is surging in the U.S., with doctor visits for flu symptoms at a 15-year high. Why is this flu season so bad?

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

(NEXSTAR) – 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 Centers for Disease Control and Prevention since the start of ...

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

Specifically, the CDC notes that H1N1- and H3N2-related variants ... Do these types of flu have different symptoms? And does one cause more severe illness than the other? Experts have been ...