New York, Feb. 17 -- "In the middle of the night, I had excruciating stomach pains followed by vomiting and diarrhea," says Tanishaka, a farmer in Sange, a town in eastern Democratic Republic of Congo (DRC), which has been experiencing its worst cholera outbreak in five years.

The epidemic has been driven by limited access to clean drinking water and a fragile health system. It has also been exacerbated by mass displacement of people fleeing ongoing clashes between the Congolese army and the armed group Alliance Fleuve Congo (AFC/M23), which have escalated in the country's east over the past two years.

Doctors Without Borders/Medecins Sans Frontieres (MSF) has launched an emergency response supporting the cholera treatment center at San...