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Background: The coronavirus disease (COVID-19) pandemic poses a grave threat to refugees and internally displaced persons (IDPs).
Background In October 2010, Haiti was struck by a large-scale cholera epidemic.
A simple method for filtering water to reduce the incidence of cholera was tested in a field trial in Matlab, Bangladesh, and proved
Batch water treatment consists of the intermittent use of settling tanks for water clarification, and is a common treatment practice