What is the flu?  Influenza, also known as the flu, is a contagious ...

Those infected with the flu are most contagious during the first three days, the CDC said. In some cases, however, people can ...

Tis the season for cooler temps, shorter days and cozy nights by the fire. Unfortunately, this time of year also marks the ...

It’s too early to have data on how long most people are sick with subclade K, but Dr. Schaffner says he’s heard anecdotes of ...

Flu cases have reached a 25-year high in the US, driven by a mutated H3N2 subclade K strain. CDC data shows record doctor ...

After child flu deaths broke a record last winter, the CDC dropped its universal flu shot recommendation for kids. Here's ...

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in Michigan.

Georgia faces a tougher flu season with rising hospitalizations. Learn key symptoms, how long you're contagious, and when to ...

The number of flu cases across the United States continues to increase, up almost 33% since the week before, according to the ...

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

Reported flu cases in New Jersey at the end of December were more than double what they were at the same time last season.