Subclade K has become the dominant form of flu and is slightly different from the virus targeted by this year’s flu vaccine.

A new form of the flu, which is highly contagious and aggressive, is sweeping the nation this season. A mutation of influenza ...

At least 14 states and Washington, DC, are seeing high and very high levels of flu, mainly caused by a surprise new influenza ...

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

(NEXSTAR) – As we get deeper into flu season, a new type of the influenza virus has been identified, the Centers for Disease Control and Prevention confirms. The new strain is a variation of influenza ...

It’s already hit the U.K. and Canada. As if the holiday season wasn’t chaotic enough, the U.S. has been gifted with an early ...

Flu season is starting to tick up in the U.S. And, looking at clues from other countries, we may be in for a rough winter. But not all influenza is the same. And there are some notable differences ...

When the flu strikes, it can feel relentless: rising fever, hacking cough, stuffy nose and sore throat. For many people, relief can come in the form of Tamiflu, a prescription antiviral medication ...