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1975 India. Outbreak investigation form

Photo credit: n/a
Source: WHO 1988, Smallpox and Its Eradication


Form for outbreak investigation which provided in the upper part for basic data about cases and, in the lower, for plotting them by date of onset to show the spread from patient to patient. The Roman numerals indicate the generations of cases. The outbreak plotted here occurred in Bihar State, India, in December 1974 and January 1975.