 
 <prompt> How dangerous water contamination dey? Given di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Given say water wey dey dirty na major way wey dey spread diarrheal disease, efforts to provide clean water supply and better sanitation fit reduce the rate of disease well well. For example, dem talk say we fit expect say pikin mortality wey dey result from diarrheal disease go reduce by 88% as we dey improve water sanitation and hygiene. Also, meta-analysis of plenty studies wey dey improve water supply and sanitation show say disease incidence fit reduce by 22–27%, and mortality rate wey dey relate to diarrheal disease fit reduce by 21–30%. 