Image provided by the United Nations Children's Fund (UNICEF) shows a medical worker distributing relief supplies in an area where cases of cholera were reported after the attack of Hurricane Matthew in Jeremie, Haiti, on Oct. 11, 2016. The UN Office for the Coordination of Humanitarian Affairs (OCHA) warned on Tuesday that 1.4 million Haitians were in need of humanitarian aid, including cholera vaccines, following the passage of Hurricane Matthew last week. (Xinhua/UNICEF)