Flooding in Pakistan has killed 1,600 and is affecting an estimated 20 million people. Six million lack access to food, shelter, and water. The report of a single confirmed cholera case (in the Swat valley) is generating some headlines, but the important point is that a lack of clean water makes the spread of any diarrheal disease far more likely.
UNICEF warns that "more than 3 million children are at high risk of deadly water-borne diseases in Pakistan," and cites a WHO projection of up to 1.5 million cases of diarrheal diseases that could occur over the next three months. These aren't just…