Cholera in Haiti

In 2015, 42 countries reported 172,000 cases of cholera that resulted in 1,304 deaths. Estimates range from 1.4 to 4 million cases per year and between 21,000 to 143,000 deaths. The UN still hasn't technically admitted that they were responsible for the Nepal epidemic. But it has pretty conclusively shown that that is where this epidemic came from. It's a disease strongly associated with contaminated sources of drinking water and lack of sanitation.