In this paper I will mention and describe only the cases of smallpox which have come under my personal observation during the past two years. Previous to 1899 Chicago had been practically free from smallpox for more than a year, having had but one case in 1898. From March 9, 1899, to the present time—about 27 months—310 cases of smallpox have been found in Chicago. Sixty-four of these in various stages of the disease were imported into the city from nineteen of the surrounding states. The cases came from as far east as New York and as far west as California. In the meantime, I visited three of the neighboring states where the diagnosis of this disease, variously called impetigo contagiosa, giant chicken-pox, Cuban itch, or some other indefinite name, was in dispute. With this opportunity of observing cases imported from such widespread and various sources, I think it is
SPALDING H. THE DIAGNOSIS OF MILD AND IRREGULAR SMALLPOX AS FOUND IN THE PRESENT OUTBREAK IN THE UNITED STATES. JAMA. 1901;XXXVII(5):302–305. doi:10.1001/jama.1901.62470310008001c
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