Influenza is a highly contagious viral infection that affects the respiratory system. Although often dismissed as a seasonal illness, it can lead to ...

Schools around the U.S. are closing due to surges of flu and other illnesses, which are sickening students and staff. Here's what parents need to know.

Two sexually transmitted infections are spreading faster than ever. Our expert guide tells you everything you need to know, ...

Many of us will likely remember our mothers warning us: "Don’t go out without a coat or you’ll catch a cold!". While some may ...