Question: Must I have my children vaccinated?

Yes. Microbes don't care what you think. They just live and if humans are their chosen host, they will sicken or kill humans.

Worse, by 'protecting' your child through refusing vaccinations, you inadvertently create a grave risk to the rest of the "herd" of humans around you.

Sorry, your position is neither logical or ethical. The human brain is 70,000 years old. Microbes (bacteria, fungi, viruses) have been at it 3.5 billion yrs. Don't fool with them.