In 2010, after the devastating earthquake in Haiti that killed upwards of 150,000 people, the United Nations began assembling a peacekeeper force to help maintain order in the shattered country. The UN staffers were housed in a basic camp along one of the country's main rivers, the Arbonite. Very basic, apparently, because the primitive sanitation there allowed human waste to spill directly into the water.
That year, adding to the earthquake's miseries, a lethal cholera epidemic began to spread through the country. According to the U.S. Centers for Disease Control, the disease was first reported in October 2010 and by May of this year had sickened more than 650,000 people and killed more than 8,000. A United Nations investigation, published last year, raised a possibility that the agency's camp was a source but also carefully avoided assigning any blame or particular responsibility.