The Typical Epidemic Series

Arthur C. Baker Mexico City

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This paper represents one section of a more comprehensive address discussing four topics—diseases that originate in plants, those that originate in arthropods, those that originate in higher animals, and those that originate in man. It is part 2 of that address and was given its title because diseases we conceive of as originating in arthropods seem to specialize along a series represented in the diagram by classes 1, 2, 3, 4, and 5 and reach their peak (when they have advanced that far) in the typical epidemic. This we define as an epidemic dependent on a reversible transmission between man and a secondary arthropod closely associated with him, and differing from the primary one in which the disease originated. This typical epidemic series, therefore, does not include all epidemic diseases, nor does it include all arthropod-transmitted diseases.

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