anchor.diff:  "Q fever, chronic",9709-7
   "Q fever, chronic",9710-5
   "Q fever, chronic",9711-3
  +"Q fever, acute",23018-5
  +"Q fever, acute",7828-7
  +"Q fever, acute",7829-5
  +"Q fever, acute",7830-3
  +"Q fever, acute",9708-9
  +"Q fever, acute",9709-7
  +"Q fever, acute",9710-5
  +"Q fever, acute",9711-3
  +"Q fever",23018-5
  +"Q fever",7828-7
  +"Q fever",7829-5
  +"Q fever",7830-3
  +"Q fever",9708-9
  +"Q fever",9709-7
  +"Q fever",9710-5
  +"Q fever",9711-3
   "Rabies, human",6523-5
   "Rabies, human",6524-3
   "Rabies, human",6527-6
  
positive.code: "Poliovirus infection, nonparalytic",5884-2
  "Poliovirus infection, nonparalytic",5886-7
  "Poliovirus infection, nonparalytic",5887-5
  Powassan virus neuroinvasive disease,10896-9
  Powassan virus neuroinvasive disease,10897-7
  Powassan virus neuroinvasive disease,10898-5
  
negative.code: "Rabies, human",6529-2
  "Rabies, human",6532-6
  "Rabies, human",6533-4
  "Rabies, animal",6523-5
  "Rabies, animal",6524-3
  "Rabies, animal",6527-6
  "Rabies, animal",6528-4
  "Rabies, animal",6529-2
  "Rabies, animal",6532-6
  "Rabies, animal",6533-4
  ROCKY MOUNTAIN SPOTTED FEVER,11482-7
  ROCKY MOUNTAIN SPOTTED FEVER,17537-2
  ROCKY MOUNTAIN SPOTTED FEVER,17538-0
  