You're absolutely right, and the time I spend worrying about any of these things is relatively low either way. As a moderately fit young adult with a good fami

You're absolutely right, and the time I spend worrying about any of these things is relatively low either way. As a moderately fit young adult with a good family medical history, only car wrecks are something that are reasonably likely to strike me in the next 10-20 years. That doesn't change the fact that, considering each on it's own, prions are scarier to me than the others. You're more likely to get kicked by a deer than eaten by a shark, but sharks are still scarier animals.