As someone with Asperger's, I can vouch for that. In high school, I helped work with some of the more severely autistic children. Some of them will never be able to even speak, let alone anything more advanced. Plenty of autistic people can function, but the worst cases are truly debilitating. Not that it's really relevant here, as there is literally no evidence tat vaccines cause autism.
By the way, if I seem more aggressive than normal, It's cause I'm irritated that my otherwise rational parents have bought into the anti-vaccine nonsense.