With measles outbreaks, flu spikes, and COVID as a seasonal threat, learn key differences between these contagious diseases, ...

The current flu season has seen the highest rate of doctor’s visits for flu-like symptoms since the US began collecting data through a national surveillance network. CNN is tracking these case rates ...

A new Influenza A variant, "subclade K," is causing a rise in flu cases across the nation. Flu symptoms can include body aches, headache, and high fever, and are often more severe than a common cold.

A new flu variant fueling a fast-paced rise in cases across the state has brought with it some symptoms unlike those many have come to associate with the virus. As cases reach "very high" levels, a ...

If it feels like everyone around you has come down with the flu, you're not imagining it. As of Jan. 9, the U.S. Centers for Disease Control and Prevention (CDC) estimates that at least 15 million ...

Doctors warn the spike is hitting families in waves, often starting with children before spreading to older relatives.

Flu cases are "very high" in Tennessee with outbreaks centered in the eastern part of the state, according to federal and state data. Tennessee has some of the highest influenza rates in the country.