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

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

Bird flu, Covid-19, and influenza are all respiratory infections spreading through respiratory droplets. While influenza ...

Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

Flu activity is at its highest level since 2009, forcing school closures and overwhelming hospitals across the U.S.

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

New Type of Antibody Shows Promise Against Multiple Forms of Flu Virus Dec. 21 ... A responsible for the 2009 H1N1 pandemic -- pdm09 -- shows that the virus has passed from humans to swine ...

Illinois is seeing a "notable increase" in hospital admissions for flu cases, according to state health officials, as levels of respiratory viruses continue to tick up. But which type of flu is ...

A new strain of bird flu has been detected on a duck farm in California. The World Organisation for Animal Health reported ...

One indicator of flu activity is the percentage of doctor’s office visits driven by flu-like symptoms. Last week, that number ...