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Recent systematic reviews have highlighted a paucity of rigorous evidence to guide water, sanitation and hygiene (WASH) intervention
Globally, an estimated 2.5 billion people lack access to improved sanitation.
Cholera remains a significant threat to global public health with an estimated 100,000 deaths per year.
Water, sanitation, and hygiene (WASH) interventions are amongst the most crucial in humanitarian crises, although the impact of the