In Huili the virus is a nonlethal symbiote. With offworld mammals (including humans), the virus is very lethal, causing high fevers & ultimately, internal bleeding. The virus, after infecting a non-Huili host, will remain dormant for up to 6 years, after which the virus multiples rapidly, killing the host in 1-3 days.
History & Background (Dossier)
A cure is known, but must be administered within the first 12 hours of viral multiplication to save the victim. The most common preventive is vaccination which is mandatory in the Mapepire Cluster, Trelyn Domain, Die Weltbund, & the Comsentient Alliance. Aslan are unaffected by this virus.