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The use of the mouse-protection test and viscerotomy for discovering the past extent and present occurrence of both aegypti-transmitted and jungle yellow fever are discussed. Further studies are necessary before methods other than vaccination can be developed for the control of jungle yellow fever. In the meantime anti-aegypti measures are imperative for the protection of cities and towns in endemic and possibly epidemic regions. Modifications in control methods have increased the efficiency and reduced the cost of anti-aegypti measures.
1 The studies and observations on which this report is based were made under the auspices of the International Health Division of The Rockefeller Foundation in cooperation with the Government of Brazil. The report covers the work of numerous colleagues on the staff of the International Health Division and the staff of the Cooperative Yellow Fever Service of Brazil.
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