Prion disease is exceedingly rare. CJD is the most common, with an incidence of 1 per 1,000,000 person-years worldwide, inclusive of all transmission vectors (including medical procedures).
Iatrogenic transmission is a rarer subset still: the riskiest transplants (with respect to CJD) are in the central nervous system. The UK tracked their transmission rates from 1970 to 2003 (a long period is needed because surgical transmission usually occurs in folks with long incubation periods - up to ten years or so) for dura transplants (something that goes into the CNS) and found a total of eight.
This article is one good step above scare-mongering, but only one.
Iatrogenic transmission is a rarer subset still: the riskiest transplants (with respect to CJD) are in the central nervous system. The UK tracked their transmission rates from 1970 to 2003 (a long period is needed because surgical transmission usually occurs in folks with long incubation periods - up to ten years or so) for dura transplants (something that goes into the CNS) and found a total of eight.
This article is one good step above scare-mongering, but only one.