Every winter, as the air sharpens and scarves return to shoulders, an old visitor also makes a reappearance: the flu. It ...

A. You might be suffering from influenza. Colds do not usually cause body aches. This year, the dominant influenza virus has ...

It may feel like you are surrounded by sniffles and coughs, but flu season activity is still low in many parts of the U.S.

The latest data on respiratory illness in the United States shows that shoppers and merry-makers are spreading more than just holiday cheer: They’re also passing around germs. In many cases, it’s a ...