Health experts say the U.S. flu season appears to be waning with two straight weeks of decline in measures of flu activity.

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

Groundbreaking flu transmission study reveals zero infections despite close contact between healthy volunteers and ...

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

Four-year-old Ellie Rudd – who loved mud and getting dressed up and having dance parties with her brother and sisters – died ...

The so-called "super flu" – a strain that doctors say appears to last longer and be very transmissible – is spreading in ...

The California Department of Public Health on Tuesday confirmed that a mutated strain of influenza is spreading across the ...

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

Flu cases are "very high" in Tennessee with outbreaks centered in the eastern part of the state, according to federal and ...

A ferocious surge of flu cases is linked in part to a variant that has not been dominant in the past few years — resulting in ...

It’s officially flu season, and humans aren’t the only ones who need to take precautions to avoid getting sick. Bird flu has ...

A confirmed bird flu case at a Georgia poultry farm led to the culling of more than 71,000 birds and triggered a quarantine ...