Spot map is used for-
Correct Answer: Local distribution of disease
Description: Ans. is 'a' i.e., Local distribution of disease o Inner and outer city variations in disease frequency are well known. o These variations are best studied with the aid of "spot maps" or "shaded maps". o These maps show at a glance areas of high and low frequency, the boundaries and distribution. o For example, if the map shows "clustering" of cases, it may suggest a common source of infection or a common risk factor shared by all the cases. o The classical example of use of spot maps was by John snow for cholera epidemic in 1854.
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Social & Preventive Medicine
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