I don't have studies but I did email the National Prion Disease Pathology Surveillance Center asking "is there a breakdown of cases of the individual Animal Prion Diseases by location and possibly by year (i.e. cases of human prion disease acquired by eating contaminated meat)?" and here was their response:

> To date, in the US, there have been no known cases of variant CJD, or human prion disease acquired by eating contaminated beef. Here at the NPDPSC, we have diagnosed 4 cases, but they were all acquired out side the US; 1 case in 2044 acquired in UK, 2 cases in 2006 acquired in Saudi Arabia, and 1 case in 2014 acquired in the middle east.

> In several western US states, Canada, and now South Korea and Norway, there is concern that chronic wasting disease (CWD), the prion disease of elk and deer, may be transmissible to people who hunt, butcher, or eat the affected animals. Although transmission of CWD from animals to humans is unlikely, recent data indicate that the barriers between species may be weakened when CWD has been transmitted from animal to animal several times (as may happen in the wild). The NPDPSC, along with the CDC, Department of Health, and the Game and Wildlife Administration, is carefully monitoring any possible case of acquired CWD in humans.

Asked for extra clarification, "So although there is a concern with CWD crossing that barrier, there still haven't been any recorded cases?"

> That is correct.