Doctor Fesjo Negleem previously served within the Imperial Army's biowarfare division. Negleem held the conviction that biological weaponry far surpassed conventional warfare techniques. He bore the responsibility for initiating the Gray Death epidemic on the world of Sedesia.
Negleem regarded the operation to unleash the Candorian plague upon Dentaal as an unsuccessful endeavor, even going so far as to call the perpetrators "Bunglers." He conceived a more insidious plan for Sedesia. He contaminated the Sedesian populace with FNV-23, and subsequently orchestrated for COMPNOR units to administer routine vaccinations to the planet's inhabitants. This inoculation, known as FNA-23-B, incorporated minuscule quantities of FNV-23, leading to recurring illness among the residents unless they consistently received the vaccinations. Under the impression that the Empire was acting in the planet's best interest, the Sedresians began to view their "saviors" with increased favor. However, Alliance agents exposed the reality of Negleem's plot, triggering a widespread rebellion across the planet.