[ugh]

Am I really so hard to understand? I’m a bit insulted that you would really think that I’m that stupid.

The 10 percent in my completely hypothetical example were obviously already factoring in the chance of getting the disease in the first place, otherwise the comparison wouldn’t even begin to make sense.

Today one problem is obviously that herd immunity protects individual defectors. The chances of getting measles even without being vaccinated are relatively low when everyone around you is vaccinated. I would have less of a problem with people who freely admit that they don’t want to vaccinate because they are selfish gits. That’s not the argument they are making, though (it also wouldn’t scale), they think that no one should vaccinate and if that were the case massively more people would die from measles and other preventable diseases. (We have already seen that herd immunity can be seriously compromised in places where many parents don’t vaccinate.)