Actually it leads indirectly. But there's "vaccines cause autism" people and then there's "a vaccine killed my first baby and I don't want to give that vaccine to my second baby" people. Not to mention the "holy cow the USA has an intense vaccination schedule compared to other countries'" people.

The "beep boop vaccinate everybody" attitude is popular because it makes people feel smarter and morally superior to others.

How many people are there where a vaccine actually killed their baby?