As stated in the parent comments that the likelihood of prions spreading in an infectious disease like fashion is very slim. Articles like this, ironically from a science-oriented publication, really don't help the conversation. Luckily modern medicine is fact based and not fear based.
Given that I have been exposed to the BSE prion, and so can never donate blood in north america, this is not a theoretical issue. The transmission of prion diseases are the subject of policy debate.
