Right now the primary question is about the comprehension, or lack of same, on the part of anti-vaxers. The actual truth about infections is almost completely irrelevant here. The question is, what tactic will keep us all safest when the primary threat comes from people who are clinically stupid?

That's purely a psychology question, and I honestly don't know what the answer is. But it's worth noting that it's pretty much all about strawmen, and which strawmen the anti-vax crowd can be manipulated into believing.