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 ...

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 ...

Illinois is seeing a "notable increase" in hospital admissions for flu cases, according to state health officials, as levels of respiratory viruses continue to tick up. But which type of flu is ...