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Systematized work of epidemiologist and health net work very soon determined the source of contamination, which was contaminated water of a tanker truck providing non drinkable water for farms that locals had used it to wash their vegetables and fruits. By efforts of health net work and city hall officials the water supply was provided from an uncontaminated source and in next few days we were visiting less number of patients and spending more time educating residents of the village about prevention. I was amazed to see how effective presence of an epidemiologist in an epidemic could be.