The origins of vaccinia virus - a brief comment.
Razzell
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D000818:Animals; D015605:Cowpox / Q000266:history*; D006663:Historiography; D049711:History, Modern 1601-; D006801:Humans; D012899:Smallpox / Q000266:history*; D006113:United Kingdom; D014612:Vaccines / Q000266:history*
D014612:Vaccines