The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

Flu activity has surged to high levels in many states, overwhelming some hospitals. Experts discuss what to expect for the 2024-25 flu season and how to stay safe.

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