Now the problem with the whole prions business is that an actual plausible causality mechanism could never be show. Plus all epidemiological models based on the Mad Cow prion theory were totally wrong. By several orders of magnitude.
Huge numbers of deaths were predicted initially, many tens of thousand in the UK alone, millions world wide The final death toll in the UK minus those with a particular genetic disorder was a few dozen max. And if I remember correctly one of those was a vegetarian.
The whole Mad Cow / prion business was just as much junk science as the current Covidian Cult.