Subclade K, which is circulating in Arizona, has been dubbed a 'super flu' but some experts say that's not an accurate ...

Much of the country is facing record flu cases thanks to a new strain of the virus. And the "subclade K" variant is likely ...

A new flu variant fueling a fast-paced rise in cases across the state has brought with it some symptoms unlike those many ...

Flu is rising rapidly across the U.S., driven by a new variant of the virus. The Centers for Disease Control and Prevention ...

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

The flu is spreading rapidly across the country, including in Northeast Ohio. Health officials warn that a new strain of ...

A new flu strain is spreading rapidly across the U.S., driving a surge in cases and hospitalizations.

Hospitals in the Bay Area are reporting more "influenza-like illness," pointing to a mutation in the strain. Medical experts ...

H3N2 subclade K strain — is responsible for 90% of influenza A cases across the U.S., which has led to double the cases in ...

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