In beginning this report to you, supplemental to that closed Nov. 30, 1907, and published in The Journal, Dec. 14, 1907, it may be well to outline, briefly, the conditions that existed at that time. Human plague was first noted in San Francisco in March, 1900, and existed there until Feb. 29, 1904, on which date the last verified case for some three years was noted. It appeared again May 27, 1907. Verified cases had occurred in several towns in Contra Costa County and in Oakland, Alameda and Berkeley, and it was surmised as far back as 1901 or 1902 that the ground squirrels in the counties of Alameda and Contra Costa had become infected with plague In spite of the urgent request of the U. S. Public Health and Marine-Hospital Service officer in charge in 1903, and in spite of the equally urgent request made in 1906 by the
PLAGUE IN CALIFORNIA AND THE ANTI-PLAGUE CAMPAIGN.. JAMA. 1908;LI(12):1010–1014. doi:10.1001/jama.1908.25410120054004
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