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Globally, an estimated 2.5 billion people lack access to improved sanitation.
Diarrheal disease is a common cause of morbidity and mortality.
Sanitation is an issue often neglected in development decision making.
The December 2004 tsunami in Sumatra, Indonesia, destroyed drinking water infrastructure, placing over 500,000 displaced persons at
Malaria control among nomadic populations has, in the past, posed serious logistic difficulties.