Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to keep growing with ...

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

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

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 ...

There are some unusual symptoms being reported with a new and mutated flu variant quickly spreading in the U.S. ahead of ...

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

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

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.

Estimates show the variant accounts for over 51% of all new cases nationwide. A highly contagious variant of the novel coronavirus that was initially identified in India is now the dominant strain in ...