Early in the last quarter of the year 1889, epidemic influenza or la grippe was reported as prevailing in Russia or northern Europe, and before the end of the quarter it was prevailing to some extent in almost every country in Europe, and in many parts of our own country. This shows a rapidity of diffusion equaled perhaps only by the epidemic of 1847, which is represented to have invaded the whole of Europe within the period of six weeks. On the other hand, the epidemic of 1831-3 was six months in reaching the same degree of diffusion. The first cases of the recent epidemic recognized in Chicago appeared during the last week of December, 1889, when one death from the disease was reported to the health office. During the following month, Januar y, 1890, the number of fatal cases reported was sixty-four; in February, thirty-seven; and in March, seven.
DAVIS NS. REPORT ON THE METEOROLOGICAL CONDITIONS AND THEIR RELATIONS TO THE EPIDEMIC INFLUENZA, AND SOME OTHER DISEASES IN CHICAGO DURING THE SIX MONTHS ENDING MARCH 31, 1890. Read in the Section of State Medicine of the American Medical Association, May 20, 1890. JAMA. 1890;XIV(23):817–822. doi:10.1001/jama.1890.02410230009002a
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