Environmental Enteropathy, now known as Environmental Enteric Dysfunction (EED), is damage to the gut following repeated infection and diarrhoeal illness.  This damage means that the gut can not absorb nutrients well, and thus contributes to poor nutrition.  This happens even without ongoing diarrhoea, so may be “invisible”.  It is thought that this is a major contributor to malnutrition, and is the reason why good sanitation, and eliminating open defecation is critical to improving nutrition....