This shows the structure of human papillomavirus (HPV), a virus that can cause warts and cervical cancer.
Permission granted for educational use/ University of Nebraska-Lincoln/ Angie Fox, illustrator/ 2009
http://www.worldofviruses.unl.edu/materials/images.shtml
Soldiers at a U.S. army hospital in France during World War I wear masks for protection from the influenza epidemic.
Public domain/ courtesy, the National Library of Medicine/ 1918
American soldiers with influenza were treated at a U.S. army field hospital in Luxembourg during World War I.
Public domain/ Photo number: Reeve 15183/ courtesy of the National Museum of Health and Medicine, Washington, D.C./ 1918
American soldiers with influenza were treated at a U.S. army field hospital in Germany during World War I.
Public domain/ courtesy, the National Library of Medicine/ 1918
American soldiers with influenza were hospitalized in a U.S. army camp facility in France during World War I.
Public domain/ courtesy, the National Library of Medicine/ 1918
American soldiers with influenza were hospitalized at a U.S. army camp facility in France during World War I.
Public domain/ photo number: Reeve 14682/ courtesy, the National Museum of Health and Medicine, Washington, D.C./ 1918
This historical political cartoon shows influenza and its symptoms.
Public domain/ courtesy, the National Library of Medicine/ Unknown date
This is an 1890 collection of seven illustrations showing people stricken with influenza.
Public domain/ courtesy, the National Library of Medicine/ Taylor, R. engraver/ Davis, Lucien, contributor/ 1890
This is a historical sign from 1918 regarding influenza complicated by pneumonia.
Public domain/ courtesy, the National Library of Medicine/ Department of Health, Chicago, Ill, creator/ John Dill Robertson, contributor/ 1918
This electron micrograph shows several particles, or virions, of an influenza virus that causes the disease in pigs.
Public domain/ Centers for Disease Control and Prevention/ C. S. Goldsmith and A. Balish, content providers/ 2009
