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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.310 Disease Transmission D018562 +
     G03.850.310.800 Disease Vectors D004199 +
     G03.850.310.330 Disease Transmission, Vertical D018445 
     G03.850.310.300 Disease Transmission, Horizontal D018446 +