Send them and their children to the border to stay with illegals infesting the country. See how they like getting sick without their immunizations. See them sober up as their kids get sick and die. No sane person who loves their kids, who respects their community would skip normal, established vaccinations.
I got polio back in 1955, just before the vaccine came out. Lucky for me it only affected my back with 50% nerve damage. But I have have spent a life time of back pain and eventually back surgery a few years ago. I only wish the vaccine had come out earlier.