Human Meta-Human Vampiric Virus, commonly called HMHVV, is a fictional disease from the game Shadowrun. The virus has been known to cause changes which often resemble abominations that are no longer human and are occasionally not even sentient.
In the Shadowrun universe, vampires and their kin are not undead, but are changed by the retrovirus into a creature needing the life energy of others to survive.
Source:
http://en.wikipedia.org/wiki/Human_M...Vampiric_Virus