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The Rockefeller Foundation Yellow Fever Commission was formed, with now-Surgeon General of the U.S. Army, Major General William Crawford Gorgas, named director of its work on the eradication of yellow fever. Their initial plans for eradication in Guayaquil, Ecuador, were delayed by World War I, as Gorgas’s energies were focused on his duties as Surgeon General until his retirement in 1918. Initial work on the project, however, did begin.

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