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

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

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

Koffarnus said the best form of protection during flu season is a flu vaccine but he said flu vaccination numbers have been going down every year for the past five years. He said it’s also important ...

Latest data shows which counties have been hardest hit by bird flu outbreaks among poultry flocks as the human case count climbs.

The newly reported H5N9 strain was found Monday at a duck farm in Merced County, California, according to the World ...

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

Schools around the U.S. are closing due to surges of flu and other illnesses, which are sickening students and staff. Here's ...

The flu is widespread and continuing to increase across Oklahoma, with positive cases and hospitalizations well above ...

The report's virological surveillance indicated there have been 8,806 lab-confirmed tests this week ― an increase from last ...

The progression of the species-jumping disease has been unprecedented, including the first-ever U.S. cases of infections in ...