MSD Manual

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Epidemic curve, common intermittent source
Epidemic curve, common intermittent source

    Epidemic curve for a hypothetical common source outbreak with intermittent exposure (eg, intermittent access to a play yard contaminated with roundworm and hookworm eggs). Case numbers peak at irregular times corresponding to the earlier exposures. The x-axis represents the day of onset of clinical signs and the y-axis represents the number of cases.

Courtesy of Dr. Donald L. Noah.