Communicable diseases across the oceans.
D000349:Africa; D003141:Communicable Diseases / Q000266:history*; D005060:Europe; D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049711:History, Modern 1601-; D006801:Humans; D008288:Malaria / Q000266:history; D008457:Measles / Q000266:history; D012899:Smallpox / Q000266:history; D013587:Syphilis / Q000266:history; D014397:Tuberculosis, Pulmonary / Q000266:history; D014481:United States; D015004:Yellow Fever / Q000266:history