A virus, which targeted the central nervous systems of those it infected, leading to seizures and then death in a matter of hours, had been secured within a Rakatan vault located on the planet of Belsavis. The Sith Empire inadvertently unleashed this virus during the invasion of Belsavis when they broke into the containment vault, resulting in its dissemination throughout the High Security Section. Although Gen'Dai were resistant to its effects, the virus could incubate within their bodies, effectively transforming them into carriers.