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Protracted conflicts in the Middle East and North Africa (MENA) region have left tens of millions of people in need of humanitarian
Globally, an estimated 2.5 billion people lack access to improved sanitation.
Clean water provision is a critical component of emergency response, and chlorination is widely used in emergencies to treat water.
This evidence synthesis identifies, synthesizes and evaluates existing evidence of the impacts of water, sanitation, and hygiene (WA