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

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

Cold and flu season can be especially challenging for families, as children are often exposed to multiple illnesses in a ...

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

Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what symptoms to watch for and how to protect yourself.

Two more children had to be hospitalized in the Intensive Care Unit (ICU) in recent days due to extremely severe flu symptoms ...

Add Yahoo as a preferred source to see more of our stories on Google. The new flu variant, H3N2 subclade K, is a mutation of the common flu A subtype, which is often the flu "going around" come late ...

This year's flu has the classic symptoms: fever, body aches, runny or stuffy nose, cough, chest congestion, headache, sore ...

Respiratory viruses are usually most active from October through March, health officials say.