My brother’s wife’s brother (his brother-in-law) is a high functioning autistic, and their parents said he was a perfectly healthy boy meeting all of his developmental milestones, and went in for a vaccine and was a whole different person within two weeks. He’s high functioning so he can live on his own, but requires somebody to check in on him once every day or two. They couldn’t remember the specific vaccine but they know that’s what did it. And there’s a lot of stories just like his.