Yes I think that studies should continue. I doubt they test every single beef slaughtered. Ponder that undertaking for a second. Thirdly I once read(on the interesting LOL) that part of being kosher meat was that no bones were cut and only deboned meat used. May be hogwash May be true. It did make me ponder what is natural though. Eating a T bone that has been cut on a band saw(down the spinal column) probably would be more of a danger than a filleted loin that is boneless. There is also the evidence of humans getting it from eating squirrel brains. Where is the worry about eating squirrels? FOOD FOR THOUGHT.