>>97744774It is all pretty convoluted, initially, Anti-Venom was made when Mr. Negative used his healing powers on Eddie, which somehow combined with the remnants of the Venom symbiote within Eddie's blood cells, and thus creating Anti-Venom, basically a pseudo symbiote with the power to "heal" anything, including super powers in the case of Spider-Man since his powers are basically the effect of radiation poisoning
NOW, in this story, apparently they made a serum at Alchemex that apparently in small doses would calm down the Symbiote but could kill it in large doses which Eddie has been using because it's spazzing out for some reason, so Spider-Man tried to kill it and dumped a vat of it on the symbiote while Eddie and Flash were fighting over it and somehow created a new Anti-Venom on Flash, I really don't understand it, it makes no sense at all.