All
 B04 Viruses D014780 +
 B04.820 RNA Viruses D012328 +
 B04.820.650 Retroviridae D012190 +
 B04.820.650.070 Alpharetrovirus D001355 +
 B04.820.650.805 Retroviruses, Simian D015301 +
 B04.820.650.589 Lentivirus D016086 +
 B04.820.650.850 Spumavirus D016092 
 B04.820.650.200 Deltaretrovirus D017977 +
 B04.820.650.375 Gammaretrovirus D017988 +
 B04.820.650.250 Endogenous Retroviruses D020077 
 B04.820.650.124 Betaretrovirus D030121 +
 B04.820.650.260 Epsilonretrovirus D030283