Despite the consumption of contaminated beef in the UK being high,<unk>  has infected a small number of people. One explanation for this can be found in the genetics of people with the<unk> . The human PRNP protein which is subverted in prion<unk>  can occur with either methionine or valine at amino acid 129, without any apparent difference in normal function. Of the overall Caucasian population, about 40% have two methionine-containing alleles, 10% have two valine-containing alleles, and the other 50% are heterozygous at this position. Only a single person with<unk>  tested was found to be heterozygous; most of those affected had two copies of the methionine-containing form. It is not yet known whether those unaffected are actually immune or only have a longer incubation period until symptoms appear.
Variant Creutzfeldt–Jakob disease
Powassan encephalitis
Autoimmune encephalitis
Saint Louis encephalitis
Viliuisk encephalomyelitis
Japanese encephalitis
Anti-NMDA receptor encephalitis
Herpesviral encephalitis