I'm fairly certain he suffered side effects from the vax. That's what got a few others like Malone to take huge red pills. Campbell was also probably influenced by all the required censorship he had to do to stay on youtube which may have made him more suspicious. One major point was when the pfizer rep admitted it was not tested for transmission. Campbell was already redpilled by then, but became much braver after that point and I am surprised they didn't ban him.