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Other public health approaches: Other            Severe   Mod.    Mild HW/S *             -         +           - DD/AR I * *    +++      +           - Hygiene         ++++   ++++   ++++ * provision of healthy water and sewage systems * * control of diarrhea and respiratory diseases Hygiene - improving personal hygiene In populations with severe public health problems supplementation in target groups and general populations are required. Target foods should be fortified, and food based approaches as well as public health measures should be instituted. # Vitamin A based food production, mixing vitamin A rich foods with other foods