Viiruste jaotus
SsRNA genoomiga viirused
Ph. Retroviridae G. Alpharetrovirus RSV (Rous sarcoma v)
G. Betaretrovirus MMTV (mouse mammary tumor v)
G. gamaretrovirus MLV (murine leukemia virus)
G. deltaretrovirus MTLV-1 (in.T-rakulise lümfooni v)
G. epsilonretrovirus wall-eye dermal sarcoma virus
G. Lentivirus HIV-1
HIV-2
SIV
CAEV (caprine arthritis encephalit)
FIV (feline immunodeficiency v)
G. spumavirus
Tsirkulaarse dsRNA genoomiga viirused: Pararetroviirused
Ph: Hepadnaviridae G. Orthohepadnavirus HBV (Hepatiit B)