A Study in Logical Epidemiology of Disease Epidemic Patterns in 3 Dimensions (Time and Place).

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Using the infectious disease surveillance data in Japan, epidemic patterns were observed in selected 12 infectious disease which mainly affects infants and children. Weekly numbers of patients per monitoring station, many of which were clinics without bed, were used in the observation period of 209 weeks between the first week of 1985 and the last week of 1988. Auto-correlation coefficients were calculated for each disease to clarify whether there was a circulatory pattern in chronological observation. The data were treated using Fourier analysis method and converted to spectrums. Finally, i was discussed how the logical data from the analysis could explain the real epidemic patterns.