Virus is a minor character in The Amazing World of Gumball. He first or only appeared in "The Virus". He was once the leader of an army of identical bacteria located on Gumball's hand, until they were wiped out by Teri. He then terrorized Gumball, Darwin and Teri by taking over various appliances. At the end of the episode, Gumball steps on him, most likely killing him.
Virus was the first Antagonist when Gumball defeated.