Toli-X
this deadly, mutated virus lived in molds that existed on the surface of certain asteroids. In this way, the virus could move from planet to planet. It infected a great number of worlds some twenty-five years before the Battle of Naboo, before the scientists and medical personnel of the Old Republic discovered a vaccine. Most who contracted the virus could be cured by the vaccine. It was later discovered that the planet Kegan had suffered an outbreak of the Toli-X virus, but because of their isolationist government, had never learned of the vaccine. A great many Keganites died because of their adherence to the General Good.