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From July 28 to Sept. 15, 1922, eleven new cases of yellow fever with six deaths have been reported. Seven of the cases were at Pánuco and the others at Tampico, the latter town being infected from the former. This new outbreak of yellow fever—the last case had been in March, in the southern part of the state of Vera Cruz—may be explained through the existence of endemic centers at some small towns. As there are usually no physicians in such communities, the infection is kept alive by children and nonimmune adults from other places. A real diagnosis is made only when an outsider gets sick and is attended in some medical center, and thus the infective focus is located. On other occasions, the first cases are overlooked, as the usual diagnosis is "hemorrhagic malaria," a disease which is generally neglected, and thus the existence of cases of
MEXICO CITY. JAMA. 1922;79(14):1161. doi:10.1001/jama.1922.02640140073030
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