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Purpose. The 2014 outbreak of Ebola virus disease (EVD) in West Africa was the largest in history.
Protracted conflicts in the Middle East and North Africa (MENA) region have left tens of millions of people in need of humanitarian
After a series of earthquakes devastated Port-au-Prince, Haiti, on 12 January 2010, safe excreta disposal became an urgent priority.
In peri-urban Monrovia, contaminated hand-dug wells were contributing to cholera outbreaks.