Typhus verdict in American history.
D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D007303:Insect Vectors; D010373:Lice Infestations / Q000266:history; D008003:Phthiraptera; D012283:Rickettsia prowazekii; D014438:Typhus, Epidemic Louse-Borne / Q000266:history*; D014481:United States