title: Introduction: yellow fever before 1900.
mesh_terms: D000569:Americas / Q000453:epidemiology; D004196:Disease Outbreaks / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D008887:Military Medicine / Q000266:history*; D014481:United States / Q000453:epidemiology; D015004:Yellow Fever / Q000453:epidemiology / Q000266:history*