Figures 1, 2, 3: The Alan Mason Chesney Medical Archives of The Johns Hopkins Medical Institutions
Figures 4, 5: American Review of the Respiratory Diseases; Reuben Ramphal, Werner Fischlschweiger, Joseph W. Shands, Jr., and Parker A. Small, Jr.; “Murine Influenzal Tracheitis: A Model for the Study of Influenza and Tracheal Epithelial Repair” Vol. 120, 1979; official journal of the American Thoracic Society; copyright American Lung Association.
Figure 6: National Museum of Health and Medicine (#NCP-1603)
Figures 7, 8, 15, 17, 22: Courtesy of the National Library of Medicine
Figures 9, 23, 24, 25: Courtesy of the American Red Cross Museum. All rights reserved in all countries.
Figure 10: Library of the College of Physicians of Philadelphia
Figures 11, 12: Temple University Libraries, Urban Archives, Philadelphia, Pennsylvania
Figures 13, 14: National Archives
Figure 16: Courtesy of the Rockefeller Archive Center
Figure 18: The Schlesinger Library, Radcliffe Institute, Harvard University
Figure 19: Courtesy of The Bureau of Naval Medicine
Figure 20: Courtesy of The Naval Historical Center
Figure 21: California Historical Society, Photography Collection (FN-30852)
Figure 26: Courtesy of Professor Judith Aronson
Figure 27: Courtesy of Dr. Thomas Shope