Well here is the major point: there is only one prion (PRNP), for which all mammals seem to be susceptible to disease. It would be odd if deer and sheep had coe

Well here is the major point: there is only one prion (PRNP), for which all mammals seem to be susceptible to disease. It would be odd if deer and sheep had coevolved the same resistances and susceptibility to PRNP due to human cannibalism