The reality is that "herd immunity" is a misnomer in the hands of idiots. First of all, the term defines that the majority will remain healthy through EXPOSURE and general resistances acquired by the group. It doesn't mean that the offspring of said group will not contract the virus/infection, it simply means the ones who do not die from it will have a greater resistance to it. Now, that entire system is based around survival of the strongest, so in order to work your weak children must be allowed to die. That way they will not reproduce and thereby reduce the herds total resistance. Unfortunately, the chances are vary good that if your child was one of the oddities that would have suffered ill effects due to vaccination, they probably won't make it through the first round of infection either... purely based on the observation that they have inferior biological adaptation qualities. Even beyond the reintroduction of survival of the fittest to the human race, sanitation methods need to be kept in check, as stigmatization will reduce exposure, thereby reducing immune responses.
I don't know, but I prefer the option where we simply do that exact same thing through controlled methods of vaccines, under the care of a physician, and avoid all the unseemly child deaths. I guess if the 0.01% that there is an unknown variable that could cause autism is enough for you to ignore the 1,700% more likely death due to measles.