A video made by Water and Sanitation for the Urban Poor (WASUP) details a study intended to explore the links between sanitation, population density, and health outcomes in Maputo, Mozambique. The video describes a controlled, before-and-after trial of an urban sanitation intervention to reduce enteric infections in children.
The link to the video is here: https://www.youtube.com/watch?v=Nyk-3jWdzn0
