All

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 B04 Viruses D014780 +
  B04.820 RNA Viruses D012328 +
   B04.820.057 Arenaviridae D001116 +
    B04.820.057.070 Arenavirus D018050 +
     B04.820.057.070.100 Arenaviruses, Old World D018049 +
       B04.820.057.070.100.500 Lassa virus D007836 
       B04.820.057.070.100.550 Lymphocytic choriomeningitis virus D008217 
 B04 Viruses D014780 +
  B04.909 Vertebrate Viruses D014712 +
   B04.909.777 RNA Viruses D012328 +
    B04.909.777.080 Arenaviridae D001116 +
     B04.909.777.080.070 Arenavirus D018050 +
      B04.909.777.080.070.100 Arenaviruses, Old World D018049 +
        B04.909.777.080.070.100.500 Lassa virus D007836 
        B04.909.777.080.070.100.550 Lymphocytic choriomeningitis virus D008217