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The great influenza pandemic made its appearance in Korea during the month of September, 1918. There seems to be no doubt that the infection came from Europe, via Siberia. The disease spread from north to south along the line of the Southern Manchurian Railway. The first cases seen by us in Seoul, the capital, were during the latter part of September. Before the middle of October the epidemic was at its height. The insanitary conditions of oriental life greatly enhanced the spread of the infection. At present it is impossible to estimate either the number of cases or deaths, as accurate information has not been received from the Japanese authorities. From one quarter to one half of the population must have been affected. Most of the schools were closed, owing to the high incidence among the scholars and teachers. As elsewhere the serious nature of the outbreak was due to
SCHOFIELD FW, CYNN HC. PANDEMIC INFLUENZA IN KOREAWITH SPECIAL REFERENCE TO ITS ETIOLOGY. JAMA. 1919;72(14):981-983. doi:10.1001/jama.1919.02610140011004