The Nexus Virus is a spiked-green microscopic cell eating virus that was created by the Galvans. The project was used often throughout the Project B.E.N. testing. The Galvans used it to see how B.E.N. reacted to universal infections. Somehow the virus was released onto Galvan Prime , killing millions. Azmuth found a way to control the the virus, though he was urged to destory it, he kept it for his own purposes. A big mistake.
Ben 10: Lost Galaxy[]
The virus is set to apear in Ben 10: Lost Galaxy.