The first U.S. H5N9 outbreak has raised concerns as scientists warn of evolving bird flu risks—here's what you need to know about the symptoms.

Symptoms usually come on suddenly, according to the CDC, and can include fevers above 100.4 degrees F, dry cough, sore throat, runny nose, body aches, headaches, chills and occasionally nausea, ...

Health officials urged people to identify avian flu symptoms early and properly cook chicken and eggs to limit risk of ...

Seasonal flu tends to spike from December to February. People who become infected tend to get a sore throat, cough, runny nose, headaches, body aches and sometimes fever. Many people describe flu ...

Influenza is high across the country and Kentucky is among the states affected. Here's what we know about how long flu lasts, ...