CDC / SCIENCE PHOTO LIBRARY CDC / SCIENCE PHOTO LIBRARY
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Smallpox vaccine tests. US virologist Nathaniel Rothstein (left, c.1920-2011) observing a laboratory technician at work in Lagos, Nigeria. She is testing smallpox vaccine vials that contain freshly processed freeze-dried vaccine. The vaccines will be used to immunize the Nigerian population against smallpox. This photograph was taken in 1967 during the Smallpox Eradication Program taking place in West Africa. Smallpox was eradicated after a successful worldwide vaccination program. The last naturally occurring case was in Somalia in 1977. Rothstein worked on this program in West Africa from 1966 to 1971.
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