#epidemic_disease  any infectious disease that develops and spreads rapidly to many people
  supertype:  #infectious_disease  a disease transmitted only by a specific kind of contact
  subtype:  #plague.epidemic_disease__pestilence  any epidemic disease with a high death rate
  subtype:  #plague  a serious (sometimes fatal) infection transmitted by the bite of an infected rat flea (especially bubonic plague)
     subtype:  #bubonic_plague__bubonicplague  plague characterized by delirium and the formation of buboes
        subtype:  #Black_Death__black_plague__blackplague  the epidemic form of bubonic plague experienced during the Middle Ages when it killed nearly half the people of western Europe
     subtype:  #pneumonic_plague__pneumonicplague  characterized by lung involvement
     subtype:  #septicemic_plague  an especially dangerous form in which infecting organisms invade the bloodstream
  subtype:  #epidemic_pleurodynia__epidemic_myalgia__myosis__diaphragmatic_pleurisy__diaphragmaticpleurisy__Bornholm_disease  an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)

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