California officials warn of an increase in flu-related hospitalizations and confirm a second severe-flu-related death.

A late-emerging influenza A mutation known as subclade K weakened protection, but doctors say vaccination still reduces ...

Have you been sick since the new year started? You're not alone; here's what to know about new H3N2 flu strain and its ...

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

Americans are being urged to be extra vigilant this winter, as a suite of influenza A mutations has created a dominant virus ...

Two friends with opposing viewpoints talk about the strain the COVID-19 pandemic put on their relationship and how they can ...

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

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 ...