title: Introduction.
authors.forename: J T
authors.initials: JT
authors.lastname: Alexander
mesh_terms: D006663:Historiography; D006666:History of Medicine; D049690:History, Ancient; D049692:History, Early Modern 1451-1600; D049691:History, Medieval; D049711:History, Modern 1601-; D010930:Plague / Q000266:history*; D014586:USSR