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

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 ...

Data from the Centers for Disease Control and Prevention shows seasonal flu activity continues to increase across the country ...

Low vaccination rates may be contributing to the spread of flu, but data suggests the number of cases so far this season is ...

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

U.S. medical services providers are seeing the greatest numbers of flu cases since the 2009-2010 flu season, the Centers for Disease Control and Prevention announced on Friday.

While we often refer to it as "the flu," the influenza virus has several strains, with flu A and flu B considered the most ...

NISD's health services director said even if a licensed nurse is absent, a staff member is always on standby, trained for ...

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

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

More than 156 million chickens, ducks, turkeys and other fowl have been slaughtered across the United States since the ...