I know of kids who have never been immunised and are on the spectrum....so who can be blamed then?
That would be to assume that ALL cases of Autism or ASD is directly linked to vaccination.

In some cases it's shown that a critical part of a child's brain development occurs at around the 18 month mark. If something in that development goes askew, then ASD is a potential outcome.

This is why a lot of parents delay the 18 month vaxes so as not to add anything else to that crucial time of development - but it still can happen in non-vaxxed children