In October of 2010 an outbreak of cholera began in Haiti. This disaster came soon after a devastating earthquake hit the country in January.
The earthquake caused hundreds of thousands of deaths and did irreparable damage to much of the country. The world responded with volunteers to help with the rebuild, including U.N. peacekeepers.
Six years after its start, we know the earthquake is likely where the epidemic began.
The U.N. admitted that some peacekeepers from Nepal carried the infection. Getting into the water supply, cholera then spread throughout Haiti.