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Introduction: The major aim of hand washing promotion programs is to persuade people to change their behaviour to reduce high-risk h
When responding to an emergency situation, ensuring safe excreta disposal is an urgent priority in the disaster relief effort.
Batch water treatment consists of the intermittent use of settling tanks for water clarification, and is a common treatment practice
Recent investigations into the March 2003 outbreak of SARS in Hong Kong have concluded that environmental factors played an importan