Vitiligo is an autoimmune condition that causes patches of lightened skin. Here’s how to tell it apart from other conditions with similar symptoms, including leprosy, melasma, and scleroderma.

Roughly 4,000-year-old bones from Chile contain genetic evidence of leprosy, suggesting that a rare form of the bacteria that causes the disease may have been circulating in the Americas and long ...

A new study has found that leprosy was circulating in Chile some 4,000 years ago, meaning the disease arrived in the Americas much earlier than previously thought.