But the most important difference between the two is that type A viruses can cause pandemics because of how often and quickly ...

Most flu infections this season are from a new variant not covered by the flu shot, but doctors say the vaccine will still ...

As flu cases rise across the U.S., those who end up contracting the virus have treatments available that may help reduce ...

Flu is rising rapidly across the U.S., driven by a new variant of the virus. The Centers for Disease Control and Prevention ...

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

"Beyond typical flu symptoms like fever, cough and body aches, warning signs include trouble breathing, chest pain, confusion ...

This year’s influenza virus has been dubbed the “super flu” for how quickly it’s spreading — and how hard it’s hitting.

U.S. flu infections are still surging, and health officials say it's a severe season that's likely to get worse.