Int J Hyg Environ Health. 2019 Jun; 222(5): 765–777. doi: 10.1016/j.ijheh.2019.05.004; To develop updated estimates in response to new exposure and exposure-response data of the burden of diarrhoea, respiratory infections, malnutrition, schistosomiasis, malaria, soil-transmitted helminth infections and trachoma from exposure to inadequate drinking-water, sanitation and hygiene behaviours (WASH) with a focus on low- and middle-income countries.