Rare form of leprosy infected people in Americas before European arrival, 4,000-year-old bones suggest

Rare form of leprosy infected people in Americas before European arrival, 4,000-year-old bones suggest

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 before the Europeans arrived.