Biological warfare

Biological warfare was the use of infectious agents, including neurotoxins and defoliants, to kill living organisms as an act of war. During the Clone Wars, Doctor Nuvo Vindi recreated and modified the long-eradicated Blue Shadow Virus disease as part of the research effort on Jedi-proof biological weapons. Later during the same conflict, Morseerian scientists worked to develop an infectious agent against the Grand Army of the Republic's clone troopers.

After clone trooper Tup killed Jedi General Tiplar during the Battle of Ringo Vinda for no reason that the Jedi and other clones could discern, Tiplar's sister Tiplee and General Anakin Skywalker wondered if his behavior could have been caused by an anti-clone virus that the Separatists had been rumored to be developing. During the Galactic Civil War, the Galactic Empire used the planet Coyerti as a testing and development ground for biological weapons.