Cure for something that never existed

As more and more people don’t give vaccines for being scared that they might be harmful for their babies relying on bullshitting, why doesn’t someone spread some suitable counter-rumour like “if your child eats mango every day, then that prevents vaccines causing autism” or so? This could be even backed by studies showing that among kids who eat mango and get vaccinated, autism is not more prevalent. Probably people who don’t vaccinate can believe anything.

Btw, I’ve just googled “amber stones against teething” and of the first 5 hits one called it nonsense, another one was an open forum debate and the other three were in favor.