| http://www.w3.org/ns/prov#value | - The World Health Organization's smallpox eradication campaign, initiated in 1967, saw the last naturally occurring case in the world in Somalia in 1977 and brought the end to mass vaccinia vaccination programs. [0004] The vaccinia virus, a live, animal poxvirus, was a highly effective vaccine responsible for the successful eradication of smallpox over 30 years ago (Kaufman et al., 2001).
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