This claim that the COVID vaccine causes prion disease was based entirely on a non-peer-reviewed paper by a guy named J. Bart Klassen. No one agrees with his conclusion, and he is not a prestigious scientist. According to USA Today, quote, in 1999 he claimed the influenza vaccine caused type 1 diabetes, a claim disproven by Johns Hopkins University Institute for Vaccine Safety. He's just an anti-vax weirdo who makes these claims pretty regularly whenever there's a vaccine that needs to be smeared.