Respiratory virus season is in full swing across California, with several illnesses spreading across the state. Cases of ...

The San Francisco Department of Public Health announced the first two flu-related deaths recorded in the city this ...

Medical experts debunk flu shot myths: vaccines use inactive virus that cannot cause illness. Discover what side effects actually mean for your immunity.

Dutch authorities have detected antibodies linked to the H5N1 avian influenza virus in a dairy cow, marking the first known ...

Flu-related pediatric deaths have doubled since last week, according to the CDC. Here's what to know this week, including ...

California officials warn of an increase in flu-related hospitalizations and confirm a second severe-flu-related death.

The Influenza A H3N2 virus subclade K represents a change in the basic structure of the influenza virus.

A particularly infectious subvariant of influenza is keeping emergency room numbers high and causing especially severe ...

A new flu strain has been detected, with the variant dubbed influenza A subclade K. How severe is the strain and does the ...

Researchers are not just worried about the virus popping up on American farms. Other types are causing trouble around the ...

A group of volunteers spent days locked in a small hotel room with people actively infected with flu. They played games, ...

LAWRENCE — Six viral diseases — including COVID-19, the flu and norovirus — have been found at high concentrations in ...