matilda, seriously, you think you know better than the Royal College of Physicians? CJD is caused by eating meat contaminated with BSE. That is a fact. It is also a fact that there have been remarkably few cases, thank heavens, despite widespread exposure - each case is a tragedy, but there are not as many as you might expect. We've been lucky. However, we may not continue to be lucky. It is possible that receiving contaminated blood, rather than eating contaminated food, may be a more efficient way of transmitting CJD, for instance.
The Dept of Health is being appallingly complacent by assuming we can just cross our fingers and hope there aren't too many blood donors carrying CJD.