You can't win them all.
D000818:Animals; D004196:Disease Outbreaks / Q000453:epidemiology* / Q000266:history / Q000517:prevention & control; D004219:District of Columbia; D004812:Epidemiologic Methods; D005845:Georgia; D006168:Guinea Pigs; D049673:History, 20th Century; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology; D008824:Michigan; D010414:Pennsylvania; D014481:United States