The Spread and Eradication of Smallpox (1919-1977)

This video shows the map timelapse of the smallpox virus from 1919 to 1977. Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980.

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Source:
World Health Organization

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Видео The Spread and Eradication of Smallpox (1919-1977) канала WawamuStats