When hunter-gatherers began living close to animals, the pathogens that cause the plague and leprosy got closer too.

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 ...