Top Definition
"Lyssa" comes from a Greek word meaning "frenzy". It is a genus of viruses in the Rhabdovirida family that is characterised by it's ability to drive its victims into a mindless uncontrollable fits of fear and aggression (this includes humans). The most well known of member of this virus is Rabies. There are numerous members of this group, such as Mokola Virus, Duvenhage Virus, Irkut Virus, Khujand Virus, as well as the theorietical virus, Lyssa X.
The Lyssavirus Genus contains some of the most frightening transmitted diseases known to man.
by Edward Stevens August 28, 2006

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