If you choose to eat beef, you may or may not get a fatal neurological disease. Sounds like an easy choice. I' ll probably die of something far more conventional first. But the whole notion of my brain turning into a sponge is so repugnant, I think it's probably a worthwhile thing to quit eating beef. Insecticides and human fecal bacteria on the imported fruits and vegetables.
Life is about choosing and each choice involves risk.
Now it turns out that Dave's risk of vCJD is too small to quantify. The causes of the British outbreak are relatively well understood. The cause was pretty well established early on. Measures were taken to stop the practices. But the British government did a bad job of informing the people.