What Columbus's voyages wrought.
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D000569:Americas; D003141:Communicable Diseases / Q000266:history* / Q000635:transmission; D004196:Disease Outbreaks / Q000266:history*; D005060:Europe; D005101:Expeditions / Q000266:history*; D049668:History, 15th Century; D006801:Humans; D008519:Medicine, Traditional / Q000266:history