| http://www.w3.org/ns/prov#value | - use malnutrition, anaemia, asthma and poor physical and intellectual development; Transmission of both bilharzia, of which there are 200 million cases worldwide, mostly among children, and trachoma, the most common cause of infectious blindness, is greatly reduced by better sanitation; Most children in villages in Africa and Asia still go to schools without toilets; girls, on reaching puberty, the
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