How long are you contagious with the flu? Experts say you can spread the virus for five to seven days after symptoms start, ...

Flu activity has ticked back up slightly in the US, thanks to a very small increase in infections caused by influenza B — ...

Cases across the country had appeared to decline before new public health data showed upticks in infections.

With months left of flu season, influenza cases are on the rise in California and transmission is high in the Bay Area, data ...

Learn how Subclade K, a variant of the influenza A virus, is affecting immune responses and contributing to this year’s intense flu season.

CHICAGO — Flu cases are increasing rapidly in Illinois as the state sees its worst flu season in more than 15 years.

Learn more about seasonal flu, including where to get a flu vaccine and how to treat seasonal flu.

Q. I’m immunocompromised and take medication for high blood pressure, irregular heartbeat and cholesterol. I tested positive for COVID and flu while traveling to California. Probably the plane trip ...

With flu activity on the rise across L.A. County, health officials are urging residents 6 months and older to get vaccinated ...

Colorado Lt. Gov. Dianne Primavera issued a verbal disaster declaration Thursday night for an outbreak of "highly pathogenic ...