Cholera still kills thousands each year -- in places without clean water, it's far from history

While cholera has nearly disappeared from wealthy countries, it remains one of the world's deadliest waterborne diseases.

Many Americans have heard about cholera only from “The Oregon Trail,” the retro computer game in which players try to get their 1830s pioneers to the Oregon Territory. If your wagon train comes down with this highly contagious bacterial infection, the pioneers could die from diarrhea and dehydration before they get out