New study reveals leprosy existed in the Americas before European explorers arrived

Scientists say a species of bacteria rewrites the history of when an infectious and potentially deadly disease first arrived in the Americas. And it was long before the arrival of European explorers.

Researchers from the Institut Pasteur in Paris, France, with help from a U.S. university, recently announced in a news release that a second species of bacteria is also responsible for the disease known as leprosy, or Hansen's disease, in the Americas. 

In years past, many believed that...