Immunization. Health worker injects smallpox vaccine with a vaccine gun into the arm of a man in tribal dress. Inoculation provides immunity to a numb

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Immunization. Health worker injects smallpox vaccine with a vaccine gun into the arm of a man in tribal dress. Inoculation provides immunity to a number of infectious diseases. Photographed in Africa.

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Size: 3732px × 4818px
Photo credit: © CDC/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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