Known as subclade K, a new, mutated flu strain that has dominated in Europe and Asia is now rapidly spreading across the US.

Super flu cases are surging, with symptoms including high fever, severe body aches, extreme fatigue, cough and lingering ...

People with flu are most contagious during the first three days of their illness. Some people, including young children and ...

The numbers are especially grim in the Big Apple: According to preliminary hospital data collected by New York City’s ...

Doctors and scientists say this year's influenza season could be tougher than usual, with a new version of the flu virus, ...

Flu symptoms typically lasts at least five days and up to two weeks. Some symptoms, like a cough, may persist even longer ...

The upcoming flu season is expected to be worse than in recent years, and health systems around South Carolina are emphasizing the importance of vaccinations to fight the spread of the virus. It’s ...

The NHS is facing severe pressure this winter as flu cases surge earlier than usual, with some calling it "super flu." Here's ...

An exponential rise in flu cases driven by a newly dominant strain has intensified pressure on hospitals across England, ...

The H5 viruses are brutally lethal to birds – 9 million have died outright, and hundreds of millions have been culled to contain the spread. Alarming is the virus's expanding reach into mammals. So ...

“We are seeing the highest number of flu cases ever recorded in a single week in New York State,” State Health Commissioner ...

Georgia sees a high rate of flu cases as CDC reports a national increase; a new flu strain challenges vaccine effectiveness.