The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.
Flu infections are at or near their highest levels in at least 15 years and are still rising, the Centers for Disease Control and Prevention says.
Eleven states are experiencing very high levels of flu and some schools have been closed by the burden on students and staff.
More than 24 million people have had seasonal flu this season, according to estimates from the Centers for Disease Control ...
Outpatient health care visits for flu-like illnesses are at their highest levels in 15 years, according to data updated ...