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

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

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

While certainly making media buzz now, Western Kentucky University Biology Professor Noah Ashley explained bird flu has been ...

Cases of the flu continue to rise nationwide and now appear to be higher than they've been in at least three decades, ...

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

The US is experiencing its most intense flu season since 2009 - This flu season has shuttered schools across the nation and ...

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

Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...

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

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