title: Maryland and yellow fever: two histories intertwined.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Ralph
mesh_terms: D004196:Disease Outbreaks / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008396:Maryland / Q000453:epidemiology; D015004:Yellow Fever / Q000453:epidemiology / Q000266:history*