I would

Travel the world, do medical missions in poor countries. Try walking in old cemeteries and take a look at the dates of deaths of the children before vaccines. Educate yourself.

Being skeptical for the sake of it isnt being brave, its being stupid.

I know it’s a difficult concept for you, but most adults were once children

It's fine if you don't want to vaccinate but I don't want to hear you freaking out about how polio has ravaged your family and your kid ended up in a iron lung in a few years as a result of selfishness, ignorance and stupidity. You will receive no sympathy from me since you decided you know better than science.

Every adult that works in a pediatric hospital. That’s who.

Adults who have splenectomies redo all vaccines. So this actually happens quite often.

Anti-vaccine people fall under the same category as people who believe the earth is flat.

I have, my parents vaccinated me, and then I vaccinated my children. Because we’re not idiots. 

Or better yet, ask those injectors to sign a notice of liability, to ensure your kid gets compensation in case of injury. Watch them squirm and chase you out. Try it!