1. Fred Soper and his Alpha Kappa Kappa fraternity brothers at Rush Medical College

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2. A nine year-old Brazilian boy, displaying the hookworms and tapeworms he expelled when treated by the Rockefeller Foundation staff

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3. Soper preparing for an inspection tour of Maranhao, Brazil

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4. Fred L. Soper's United States passport

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5. Excerpt from Fred Soper's diary

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6. Excerpt from Fred Soper's diary

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7. Excerpt from Fred Soper's diary

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8. Excerpt from Fred Soper's diary

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9. Excerpt from Fred Soper's diary

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10. 'Ubiqueteers' J.H.U. School of Hygiene and Public Health

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11. Excerpt from Fred Soper's diary

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12. [Counting hookworms in prisoners in Asuncion, Paraguay] (image 1)

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13. [A type of privy put in as a result of the campaign against hookworm in Paraguay] (image 3)

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14. [A type of privy put in as a result of the campaign against hookworm in Paraguay] (image 4)

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15. [Counting hookworms in prisoners in Asuncion, Paraguay] (image 2)

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16. [A type of privy put in as a result of the campaign against hookworm in Paraguay] (image 1)

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17. [A type of privy put in as a result of the campaign against hookworm in Paraguay] (image 2)

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

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

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

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21. Excerpt from Fred Soper's diary

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22. Bidding the Sickness Cease

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23. Excerpt from Fred Soper's diary

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24. Fights Mental Ills of College Youths

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25. Excerpt from Fred Soper's diary

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26. Fred L. Soper

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27. Excerpt from Fred Soper's diary

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28. Excerpt from Fred Soper's diary

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29. Memorandum from M. E. Connor to Clementino Fraga

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30. Excerpt from Fred Soper's diary

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31. Excerpt from Fred Soper's diary

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32. Excerpt from Fred Soper's diary

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33. Excerpt from Fred Soper's diary

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34. Perifocal spraying of a water container in squatter dwelling in Caracas, Venezuela

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35. Microscopists screening Anopheles larvae for Anopheles gambiae

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36. Sanitary inspector checking for Aedes aegypti mosquito larvae in Mexico

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37. Yellow fever vaccination in Belem, Brazil

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

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39. Excerpt from Fred Soper's diary

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40. Excerpt from Fred Soper's diary

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41. Studies of the Distribution of Immunity to Yellow Fever in Brazil

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42. Emergency cemetery for malaria victims in Ceara, Brazil

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43. 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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44. Yellow fever laboratory, viscerotomy section, Rio de Janeiro

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45. Instruccoes para Representantes do Servico do Febre Amarella em Postos de Viscerotomia [Instructions for Representatives of the Yellow Fever Service on Viscerotomy Posts]

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46. The New Epidemiology of Yellow Fever

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47. Yellow Fever Service and Rockefeller Foundation personnel after a staff luncheon in Rio de Janeiro, Brazil

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48. Notecard with photo of the yellow fever laboratory in Rio de Janeiro, and inset photos of rhesus monkeys in lower corners

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49. [Stopping mosquitoes at the border] (image 2)

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50. [Stopping mosquitoes at the border] (image 1)

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