Wolf J, et al. - Researchers performed a systematic review of articles published between 1970 and February 2016 to update the assessment of the impact of unsafe water, sanitation and hygiene (WaSH) on childhood diarrhoeal disease. They noted that point-of-use filter interventions with safe storage reduced diarrhoea risk by 61%; piped water to premises of higher quality and continuous availability by 75% and 36%, respectively compared to a baseline of unimproved drinking water; sanitation interventions by 25% with evidence for greater reductions when high sanitation coverage is reached; and interventions promoting handwashing with soap by 30% vs no intervention. Results thereby suggest that household connections of water supply and higher levels of community coverage for sanitation may particularly be impactful which is in line with targets of the Sustainable Development Goals.