The ceramic filter FILTRON was made by the company Merinsa, in partnership with the American association Potters For Peace, for families living in the slums around Lima and who do not have access to drinkable water. A study was undertaken to see the influence of the filters on the reduction of stomach diseases: a filter was given to 60 families in a slum of Lima and they were studied compared to 60 other families without filter. The FILTRON proved to be very efficient in the reduction of stomach diseases. At the end of the experiment, a filter was given to all the 120 families.
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