Because he likes to play these little weasel games, its impossible to truly know. He is over 70, so its entirely possible to not only have multiple major health issues at once, but even have them independent of the vaxx.

But he staked his legacy to it, even going so far as to plant the seed for us to blame it for this cancer, so everyone is going to just say that was the case. And he will die and be known after as literally killing himself to prove the internet wrong.