Outpatient health care visits for flu illnesses are at their highest levels in 15 years, according to data updated Friday by ...

The Centers for Disease Control and Prevention lists Illinois in the high category for flu cases, and across the Chicago area ...

Two states are changing how they test for bird flu, following a new advisory from the Centers for Disease Control and ...

Scientists are calling on the U.S. Centers for Disease Control and Prevention (CDC) to disclose data about the risks of bird ...

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

The weekly number of lab-confirmed influenza cases on Long Island was the highest in at least the past two seasons, with ...

Two state health departments have issued new guidance on testing for the bird flu, following a CDC advisory, even as it says ...

San Mateo County public health officials reported finding H5N1 bird flu in a pet cat and a backyard poultry flock.

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

With data showing a significant rise in flu cases nationwide, medical experts are describing it as the worst flu season since ...

Florida experiences "very high" flu activity, causing public health concerns and prompting calls for vaccinations and early ...