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

WASHINGTON (AP) — Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to ...

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

A variant of influenza A, H3N2, is spreading across the U.S., with low vaccination rates contributing to infection rates.

As the end of the year approaches, health authorities are keeping a close watch on a new dominant flu strain circulating ...

Three counties across the Palm Beaches and Treasure Coast are seeing a surge in cases. Health officials pointing to lower ...

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

Changes in the key antigenic regions of H3N2 viruses suggest that the upcoming flu season may require closer attention to ...

A North Alabama emergency doctor thinks the H2N2 subclade k variant is driving the surge in flu cases in North Alabama, and ...

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

The variant has mutations that may allow it to evade some vaccine protections, though the current flu vaccine still offers some defense.

A variant strain of the coronavirus, one that was first discovered in the United Kingdom, is now the dominant strain of the virus circulating throughout the United States, CDC Director Rochelle ...