Circular rashes may be puzzling—and alarming. The instant most individuals catch sight of a circle or ring-shaped area on the skin, their initial reaction is always ringworm. Although ringworm is a ...

Discover why whooping cough is surging among adults. Learn the 7 shocking reasons behind this dangerous comeback and how to protect yourself.

The recent death of a British woman from rabies after a holiday in Morocco is a sobering reminder of the risks posed by this almost universally fatal disease, once symptoms begin.