Haiti

Last October, following the UN General Assembly, the former Secretary-General admitted the role that the UN had in starting Haiti's cholera epidemic in 2010.  Ban Ki-moon spoke directly about the need for a new strategy to aid the country, before adding "I will give you details on this strategy." Looks like he played us for fools.
www.nature.com
Haiti did not have a single case of cholera until October 2010 -- 10 months after a devastating earthquake leveled the country on Jan. 12 of the same year, killing up to an estimated 300,000 people.