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 ...

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.

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

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.