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

Flu activity continues to remain elevated across the U.S. with at least 18 million cases, according to newly released data ...

The CDC on Friday posted the latest data showing a big drop in flu hospitalizations and a smaller but significant decrease in ...

Flu activity in Michigan is considered "very high," according the latest report from the U.S. Centers for Disease Control and ...

The U.S. flu season appears to be waning with two straight weeks of decline in measures of flu activity, according to the ...

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

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

I overlooked my flu shot this winter. Over the Christmas holiday, I paid the price. My entire family was felled by the flu. I ...

The surge in cases arrives as four factors threaten to make the illness more severe than the usual, according to doctors.

The adenovirus is a new strain that attacks the respiratory system, eyes, kidneys and, other organs seemingly in minutes — ...