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

The CDC estimated there have been at least 7.5 million illnesses in the U.S., 81,000 hospitalizations and 3,100 deaths from ...

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

A new flu variant fueling a fast-paced rise in cases across the state has brought with it some symptoms unlike those many have come to associate with the virus. As cases reach “very high” levels in ...

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

North Texans face a surge in flu cases, identifying a new strain called "Super Flu," with a notable increase after holidays.

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

The U.S. Department of Health and Human Services has reduced the number of recommended vaccines for children, including flu ...

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 ...