Assertion: bse's incubation period | /r/CapableOf | cross a species barrier
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text: All of these human studies, in addition to the extremely prolonged and variable incubation periods seen in prion transmission experiments when crossing a species barrier, suggest that persons encoding any of the 3 human PrP codon 129 genotypes may be susceptible to vCJD, including secondary vCJD transmitted through blood transfusion, blood products, tissue and organ transplantation, and other iatrogenic routes.