In 2010, the United Nations sent a group of soldiers from Nepal on a largely U.S.-financed peacekeeping mission in post-quake Haiti. But the U.N. neglected to adequately screen the mission’s soldiers for cholera, a disease that was raging in Nepal at the time but that Haiti had never experienced. Shortly after the soldiers moved to the U.N. base in Haiti located upstream from a major river system, Haitians began to contract the disease at an alarming rate, sickening more than 647,000 Haitians and taking more than 8,000 lives. Since then, U.N. leaders have attempted to deny the organization’s role in the epidemic and last week declared claims brought by Haitian families in the wake of the epidemic null and void. Read Jonathan Katz’s full story about the U.N. fiasco here.