I did not think so at first, but the more I learn about AS the more I can see that my father has traits (not a fullblown case of it though). My mother does too, but less so, she is more in the realm of OCD.
My husband also has traits, and 2 of our children do (1 is diagnosed).
If there is a vaccine (or [insert other external varible here]) issue it could be that the AS brain is more vulnerable to certain chemicals... I have seen it posited that AS brains respond differently to psychiatric meds, for instance. All purely specualtive, but something to consider.
I believe 100% that it is hereditary, but that the degree of functionality is controlled or determined by external influences (not just chemical, but attachment to parents and family, etc).