Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...

This year, the most prevalent variant is subclade K, which is a subtype of influenza H3N2. Subclade K was first detected in ...

All viral activity benchmarks have gone down, except for a slight increase in the death rate. Here's what to know about the ...

Flu season in the U.S. is particularly bad this year, and a new branch of the flu family tree may be to blame. If it feels ...

Even as doctor visits and hospitalizations from the flu decreased, an additional 15 children died last week. Doctors caution ...

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 ...

If you are not feeling well, stay home. Common flu symptoms include fever, body aches, headaches and a sore throat. And if ...

After reporting was delayed due to the holidays, new CDC data shows the flu is spreading, with 33,000 people hospitalized ...

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

State health officials confirmed a second pediatric death associated with the flu this season. Here's what to know.

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

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