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

High-achieving families can look perfect on the outside, but there is often a hidden toll of success. Small, intentional ...

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

Known as subclade K, a new, mutated flu strain that has dominated in Europe and Asia is now rapidly spreading across the US.

The mutated strain, known as subclade K, is causing a surge in cases in the United Kingdom, Canada, and Japan. Here's what to ...

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 ...

A new strain called H3N2 subclade K has emerged, raising concerns that the body may not be able to fight it off as well.

Louisiana ranks among the top states for flu cases nationwide, and health officials expect those numbers to remain high ...

Viruses can change and alter their genetic make-up. When these changes occur, the virus may become more or less of a threat to the human host. Virologists are therefore interested in tracking the ...