FNV-23
known as the Gray Death, this Imperial-created virus was first tested on the planet Sedesia. Developed under the auspices of the Pathogen-Based Loyalty Enhancement Program by Doctor Fesjo Negleem, FNV-23 had the property of continually changing its antigen needs, making it impossible for an individual to become immune to it. Doctor Negleem later developed the antigen FNV-23-B to help counteract its effects, making it appear that the Empire had helped save the Sedesian people when, in reality, they had made them dependent upon the Empire for their survival.