Transactions of the Plague Control Conference of the United States Public Health Service and Twelve Western States
The plague problem is potentially of grave public health importance. The history of this disease over a period of centuries shows that it has several times assumed epidemic proportions, especially in cities. History also shows that when the disease appears in bubonic form contracted from rat fleas, it sooner or later may assume the pneumonic type and be spread from person to person with fatal results.
From the evidence presented to the conference it appears that complete control of plague is not economically feasible without a great increase in Federal, State, and local expenditures. It is recommended that funds are made available for adequate survey and control work, an educational campaign to bring about greater appreciation of the dangers inherent in infected rodents habitat, and rat-proofing and eradicative measures to be taken in all cities and population centers.
United States Public Health Service, "Transactions of the Plague Control Conference of the United States Public Health Service and Twelve Western States" (1941). Elusive Documents. Paper 2.