title: The earliest notes on the reproduction number in relation to herd immunity: Theophil Lotz and smallpox vaccination.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nishiura
authors.forename: Klaus
authors.initials: K
authors.lastname: Dietz
authors.forename: Martin
authors.initials: M
authors.lastname: Eichner
mesh_terms: D004813:Epidemiology / Q000266:history; D049672:History, 19th Century; D006801:Humans; D032521:Immunity, Herd; D012899:Smallpox / Q000266:history*; D012900:Smallpox Vaccine / Q000266:history*; D013557:Switzerland; D014611:Vaccination / Q000266:history
chemical_list: D012900:Smallpox Vaccine