Bruce Banner, aka the Hulk, was visiting his cousin, Jen Walters, in New York when symbiotes attacked. In his anger, Banner became the Hulk and killed every last symbiote in the area. The Hulk soon claimed he would never return to Banner's body until every symbiote is dead. Ironically, the Hulk has since acquired a symbiote of his own.
Hulk Symbiote

Symbiote Hulk

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