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Purpose. The 2014 outbreak of Ebola virus disease (EVD) in West Africa was the largest in history.
After a series of earthquakes devastated Port-au-Prince, Haiti, on 12 January 2010, safe excreta disposal became an urgent priority.
Following the Asian tsunami of 26 December 2004, the vital domestic fresh-water wells in the coastal zone were either scoured out of
In peri-urban Monrovia, contaminated hand-dug wells were contributing to cholera outbreaks.