Health effects and impact of water supply and sanitation.
D005767:Gastrointestinal Diseases / Q000453:epidemiology; D006304:Health Status; D006801:Humans; D009747:Nutritional Physiological Phenomena; D011634:Public Health; D012499:Sanitation / Q000191:economics; D014876:Water Pollution / Q000009:adverse effects; D014881:Water Supply