A mutated flu virus is spreading across the U.S., with 86.8% of recent cases identified as H3N2 subclade K. The flu shot is ...

In 2025, a newly mutated strain of the flu virus, H3N2 subclade K , has sparked global concern. The strain has obtained seven ...

The latest data on respiratory illness in the United States shows that shoppers and merry-makers are spreading more than just holiday cheer: They’re also passing around germs. In many cases, it’s a ...

The strain—identified in some regions as H3N2 subclade K—has gained traction internationally, prompting warnings from health ...

Flu season is underway throughout the U.S. and doctors say now is the time to consider getting your flu shot if you haven't already.

New York City logged the first “very high” flu activity reading of the year, raising concerns about the season ahead.

H3N2, a potent influenza A subtype, is driving significant flu outbreaks globally, causing substantial hospitalizations, ...

The U.S. is seeing a post-Thanksgiving spike in influenza, data released by the Centers for Disease Control and Prevention on ...

The mutated strain, known as subclade K, is causing a surge in cases in the United Kingdom, Canada, and Japan. Here's what to know.

It may feel like you are surrounded by sniffles and coughs, but flu season activity is still low in many parts of the U.S.

"Last year, we had one of the most severe influenza seasons that we've had for many years. In part, it was driven by H3N2," Piedra told MedPage Today. "This year, chances are that it will be equally ...

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea and nausea, especially among children. As with COVID, some people also ...