Autist here who loves to read research about autism.

There is absolutely no correlation between autism and vaccines. Neurodivergence cannot be caused by immune system problems.

People are born autistic with a brain programmed by their DNA to form alternative neurological connections compared to neurotypicals. A neurotypical cannot be turned/mutated into being autistic and vice versa.

The only correlation that exists is that people who are neurodivergent are prone to develop some unhealthy habits (from extra stress, sleep schedules, and being a picky eater etc) which in turn can lower your immune system.

Feels weird that i have to explain this, but not all Research is funded by big pharma.

The majority of research on autism is not about Vaccins either but about understanding the many properties from which it emerges.

By understanding what autism actually is, which is often studied by autistic researchers who are motivated to understand themselves better it becomes self evident that we are far from reaching a technological point where we can create a drug to cause or even simulate the complex nature of it.

You could just aswell claim that vaccins cause people to shapeshift into cats, if you understand the subject matter thats just as non-realistic

If you want to bash vaccines you could state that an experimental accidental wrong mixed variant could cause death. Which would still be an incredibly unlikely freak accident but at least reality allows the technical possibility for such a mistake.