Is this the study that showed that unvaccinated kids who had an autistic older sibling were more likely to be autistic - because parents had an autistic child,

Is this the study that showed that unvaccinated kids who had an autistic older sibling were more likely to be autistic - because parents had an autistic child, decided vaccines were the cause, had more kids and never vaccinated - but autism is mostly genetic with in-utero activation so obvs genetics...