How do you prove a negative?
I would assume you would do it by proving that the instances of autism or disabilities that occur directly after immunisation are caused by something else, and it's a coincidence that the child was vaccinated recently.

This is my problem too Lilias, I've done research on it, but everywhere you turn people are focussing more on discrediting other researchers than they are on finding out the truth. At the absolute maximum, I would delay and separate my childs vaccinations, because I'm not 100% comfortable with not vaccinating them at all. But I want to be comfortable with it, lol.