Two and a half billion people worldwide lack access to proper sanitation. Three million of them are in Lima, Peru’s capital. Although poor sanitation in slums also affects men, it is women in the slums who suffer the greatest burden, as they are unable to relieve themselves discreetly due to a variety of factors, including their modesty and susceptibility to sexual attacks. This is in addition to other health risks, especially diarrhea, which kills 1.5 million children under five each year. Poor sanitation also contributes to developmental delays in children through infections.