Much of the concern this flu season is coming from the spread of subclade K, a subtype of influenza A. Similar subtypes have ...

A highly contagious flu mutation called subclade K is sweeping the nation, raising health concerns about vaccine ...

Flu season in America is underway with a new variant called subclade K, recent Centers for Disease Control and Prevention ...

A novel influenza variant called subclade K appears to be driving an uptick in cases and hospitalizations throughout the U.S.

The highly contagious norovirus is spreading quickly across the country as the year comes to a close thanks to a surging ...

Flu season intensifies as the new H3N2 variant causes severe illness worldwide. Experts urge vaccination, hand-washing and ...

Last year’s flu season was the roughest in nearly a decade. “We generally don’t have two bad flu seasons back to back,” said ...

Health officials are warning people about a flu virus called H3N2 that is spreading in the United States and other countries ...

A new version of the common flu is spreading globally, and health officials are monitoring this evolving strain of influenza ...

The mutation, known as subclade K, has already caused a surge in flu cases in Australia, Canada, Japan, and the U.K.