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Secondary Barrier Host Safe eating(food washing) Boiling Foods Hand washing after defecation, before food handling Safe Storage Safe waste reuse Food protection Water protection in transit and in home Fingers Vectors Crops Water Appropriate toilet (VIP latrine, pour-flush-soak away) Water source protection against contamination Composting latrine Sewerage and wastewater treatment, jokaso Primary Barrier Feces
1960 1965 1970 1975