A “Citizens’ Health Committee,” made up of thecity’s most prominent leaders and appointed by the mayor,backed Blue’s strategy: By inspection, identify rat refugesand destroy them; remodel housing and commercial proper-ties to eliminate potential rat refuges; trap, poison, andslaughter rats as well as autopsy them to determine the prev-alence of plague-infected animals; and identify and isolatehuman cases of plague. Blue was indefatigable and, by theend of 1909, plague had disappeared from San Francisco.Yet, a sinister consequence of the epidemic had been discov-ered: Plague had spread widely in the ground squirrel popu-lation of northern California, where it remains endemictoday!
This task is unbelievalbe. In 1906, The level of medical treatment is not as good as it is now, and the transportation is not as developed as it is now, but people have actually completed all the plague isolation, which is a difficult thing at present.