I know of no one that has had the measles vacc that has then contracted measles.
You can prevent your children from receiving vaccines thats fine, but when your child contracts a condition because they weren't inoculated against an easily defended condition through vaccines, thats on you.
There's a reason the united states saw a rapid decrease of those conditions due to the rigorous vaccine program.
Will there be adverse effects on a percentage of the population , sure.
A certain percentage of daily drivers die each day also!
Are you banning roads and vehicles yet?