A 4000-year-old skeleton from India bears evidence of leprosy, making it the earliest archaeological evidence of the disease in the world.
As infectious diseases go, leprosy is still one of the least well-understood, in part because the Mycobacterium is difficult to culture for research and it has only one other animal host, the nine banded armadillo. An Indian or African origin for the disease has often been assumed based on historical sources that support an initial spread of the disease from Asia to Europe with Alexander the Great’s army after 400 B.C. Skeletal evidence for the disease was previously limited to 300-400 B.C. in Egypt and Thailand.