The Krytos virus was a genetically engineered bioweapon designed by the Galactic Empire in 7 ABY that caused the deaths of millions of aliens. Once it infected a host, the virus destroyed the infected host body cell by cell until the victim's flesh fell apart completely, resulting in an agonizing death. Highly contagious, the Krytos virus was designed to both target only non-Human populations and be treated by large amounts of bacta. The virus was transmitted by physical contact or through a water supply, but could not spread by airborne transmission.