A virus that most physicians have never heard of can replicate inside human lungs. That is the central finding from recent ...

The influenza D virus that researchers say has been flying under the radar since its detection in animals in 2011 can ...

We're keeping an eye on new influenza and SARS-CoV-2 viral variants. Here's what we know about those viruses—and your immune ...

Some surveys have shown that nearly 30% of people believe getting a flu shot can actually cause influenza. This belief is likely due to common side effects linked to the vaccine, including headache, ...

Even if a virus escapes our antibodies and causes infection, our immunity wall protects us from severe disease.” ...

Everything you need to know about the flu vaccine, including the nasal spray, egg-free options, who it’s free for and what to ...

Add Yahoo as a preferred source to see more of our stories on Google. If you were sick over the holidays, you were far from alone as a new strain of influenza spread across the nation. The Centers for ...

Locals and visitors poured into the Fort Worth Stockyards where the new year is off to a fun and healthy start despite an increase in flu cases across North Texas. Kelly Roque from South Carolina is ...

Older adults and immunocompromised individuals in England face a disproportionately higher burden of severe influenza outcomes and hospitalizations.

Last week, the Food and Drug Administration dealt a surprising setback to Moderna, a biotech company that created one of the mRNA vaccines against COVID-19. The agency rejected Moderna's new flu shot.

Avian influenza (bird flu) is a highly contagious disease of wild and captive birds. Controlling its spread remains a major ...