#pox  a contagious disease characterized by purulent skin eruptions that may leave pock marks
  supertype:  contagious_disease__contagion  any disease easily transmitted by contact
  subtype:  smallpox__variola  a highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars
  subtype:  chickenpox__varicella  an acute contagious disease caused by herpes varicella zoster virus; causes a rash of vesicles on the face and body

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