41. Rural family in Caicara, Brazil with an officer from the malaria service

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42. [Yellow Fever Service public information posters as they appeared in streetcars in Recife, Brazil] (image 1)

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43. [Yellow Fever Service public information posters as they appeared in streetcars in Recife, Brazil] (image 2)

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44. [Yellow Fever Service public information posters as they appeared in streetcars in Recife, Brazil] (image 3)

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45. Fred L. Soper and Alexander W. Burke crossing a bridge to investigate an area where yellow fever occurred without the Aedes aegypti mosquito

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46. Yellow fever vaccination in Belem, Brazil

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47. Signing the agreement between the World Health Organization and the Pan American Sanitary Organization, 24 May 1949

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48. Perifocal spraying to control mosquito breeding in Asuncion, Paraguay

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49. Pan American Health Organization (PAHO) headquarter buildings in Washington, DC

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50. Fred Soper in India

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51. Typhus in Naples (page 1 of 2)

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52. Typhus in Naples (page 2 of 2)

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53. Bandeiras Usadas Pelo Servico Nacional De Febre Amarela [5-8]

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54. Bandeiras Usadas Pelo Servico Nacional De Febre Amarela [1-4]

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55. Boletim De Inspecoes Do Guarda

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56. [Stopping mosquitoes at the border] (image 3)

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57. Soper walking with Brazilian President Getulio Vargas

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58. Fred L. Soper's United States passport

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