Many individual studies have reported results of interventions intended to reduce illness through improvements in drinking water, sanitation facilities and hygiene practices. This paper provides a formal systematic review and meta-analysis examining the evidence of the effectiveness of these...

Many studies have reported the results of interventions to reduce illness through improvements in drinking water, sanitation facilities, and hygiene practices in less developed countries. There has, however, been no formal systematic review and meta-analysis comparing the evidence of the...