If you're trying to get these pills to the kids, and half of them are not in school, it's kind of like this Catch-22: in order to get them to take a pill a day or a week or whatever, the ideal is for the teacher to pass the pills out with a glass of clean water. You would think that would be a simple thing in our society, but it's not a simple thing in those societies.
Is reaching these children on the street a problem too?