It’s a simple question, but the answer is devastating to the case that vaccines don’t cause autism. From Steve Kirsch at stevekirsch.substack.com:
I asked parents when they first noticed ASD behaviors in their child relative to the time of the NEAREST vaccination visit. The results were stunning.

Science itself is unambiguous about the link: vaccines cause autism. See this excellent article for the full story.
Executive summary
If vaccines aren’t triggering autism, then the number of times a parent notices autistic behaviors BEFORE a wellness visit where a vaccine is given should be comparable to the number of times AFTER the visit.
I asked 642 parents who had previously reported having an autistic child in previous surveys to fill out my survey. I received 273 responses.
58 parents reported first seeing autistic behaviors within a month AFTER a vaccine appointment.
0 parents reported first seeing autistic behaviors within a month BEFORE a vaccine appointment.
This is stunning. It is highly unlikely you’ll get a disparity like this if vaccines aren’t triggering autism. It’s about the same as the chance of throwing a fair coin 58 times and getting all heads: 1 chance in 2.8e17 which is about as close to impossible as you will ever find in nature.
But the more stunning thing is that no autism researcher in the world has ever even thought to ask such a question. Ever.
In nearly 100 years, there are no papers in the scientific literature that have ever looked at this. Zero. Zip. Nada.
If I’m wrong, nearly every pediatrician in the world should have roughly even stats for # cases within 1 month before a vaccine appointment vs. 1 month after a vaccine appointment.
All you have to do is name one pediatrician who has more autism reports from parents 1 month before the child’s vaccination visit vs. 1 month after the child’s vaccination visit. Just one.
If vaccines don’t cause autism, then half the pediatricians in the world should have statistics that satisfy the challenge.