NEW YORK (AP) — The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

Schools around the U.S. are closing due to surges of flu and other illnesses which are sickening students and staff. Here's ...

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

With respiratory illness season at its peak, the latest CDC data shows a significant rise in flu cases nationwide, while ...