I only worked in public health for a couple of University terms. No doubt Musket knows more.

I think his top down view is good.

But from the parents point of view it is not cut and dried. A parent need only look a thalidomide baby to see that the medical professional is not infallible.

It is prudent to get all the facts not just to base your actions on hysterical media reports.

A parent at that time had access to information that separate shots for Measles Mumps and Rubella had no link to autism, not even a coincidental perceived risk. They could have asked for them separately and if necessary paid out of pocket. Instead they chose no shot and now their kids have measles. Which I guess is fine if they can live with the risks. But they did put others at risk. They have no room to complain about it now.