The focus of this study is to analyze the Worldwide Anti-Yellow Fever Campaign launched in 1914 by Wickliffe Rose, the first Director of the International Health Board (IHB) of the Rockefeller Foundation (RF). This campaign was developed between the 1910s and 1930s and continued after World War II, under the auspices of the Pan American Sanitary Bureau (PASB) with a new name, "Continental Campaign for Eradication of Aedes aegypti." At this time the PASB was directed by Fred L. Soper (1947-1959), a U.S. sanitarian, physician, and former regional director for the IHB in Brazil (1927-1942). Soper led the anti-yellow fever and malaria campaigns launched by both the Brazilian government and the RF beginning in the 1920s through the 1930s. During the first semester of 2012 I visited the Rockefeller Archive Center (RAC) twice in order to gather research material for the above-mentioned study that integrates into my Ph.D. project. The first visit was in January, and the second visit, supported with an RAC Grant-in-Aid, occurred in the first two weeks of April.