New Mexico, Texas and Nebraska are among the states with the highest number of people showing flu-like symptoms.

The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

Doctor's visits for flu symptoms are at a 15-year high. Why is this flu season so bad? Doctors discuss flu severity, symptoms and how to stay safe.

Schools in at least two states canceled classes at the start of this week amid a surge in influenza cases nationwide.

Cases of the seasonal flu in the U.S. have reached their highest numbers in more than a decade, according to the Centers for Disease Control and Prevention.

Influenza cases continue to mount with the virus reaching activity levels in the U.S. not seen for the last 15 years, according to the Centers from Disease Control and Prevention.

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

The flu vaccine is developed using data monitored from around the world to predict what the most common strain will be. The ...

Flu season is hitting North Texas hard. FOX 4's Lori Brown spoke to a family whose 7-year-old son was hospitalized with ...

Arkansas is battling flu season, with the Arkansas Department of Health reporting 30 flu-related deaths.One of those deaths ...

South Carolina is one of a handful of states with the highest number of flu cases in the United States, according to data ...

Health officials are monitoring two predominant strains of seasonal flu—Type A H1N1 and Type A H3N2—that are causing most of the illnesses. Map showing which states have recorded the most ...