Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...

While vaccines may not fully protect everyone, public health experts say they’re still proven to help prevent serious illness ...

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

A highly contagious influenza A (H3N2) variant is driving more ER visits, and health officials warn the peak of flu season ...

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 ...