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

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

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.

Influenza is a highly contagious viral infection that affects the respiratory system. Although often dismissed as a seasonal ...

During the winter, doctors see patient after patient with cold and flu symptoms. Here's how they avoid getting sick—tips you ...