GH1 and variant Creutzfeldt-Jakob disease: Contagious spread is usually related to inoculation of contaminated human tissues (extracted growth hormone (GH), corneal transplant, and dural graft), deep cortical EEG procedure, or consumption of infected proteins, such as kuru or bovine spongiform encephalopathy (BSE) and the variant of human Creutzfeldt–Jacob disease (vCJD)] caused by scrapie [14].