99% of the world's children are vaccinated. If vaccination actually causes Autism, then at least 1% of them should be autistic.
That's a ludicrous argument on several fronts. Firstly it assumes that all vaccinations are the same. Secondly the 'at least 1%' is an arbitrary metric that you seem to have pulled right out of your ass.
But that is not the case. Studies have shown that the rate of Autism is same with both the vaccinated populations and the non-vaccinated ones. Christian religious nuts, who are opposing vaccination are no better than those Islamic radicals who shoot people for taking polio vaccines.
'studies' seem to be funded by two main groups, and usually in coordination with one another; then pharma industry and the government bodies.
The incentive for pharma corporations to achieve a particular result is fairly obvious. It cannot be argued that government policy is not aimed at manipulating the dynamics of a population since that is the whole reason for vaccination programs in the first place. It could be argued that they do so with the exclusive goal of improving lives on an individual or a collective basis but I personally don't take this suggestion at face value.
A number of observations do indicate that populations with different vaccination profiles do have different outcomes. According to some, the Amish have near zero autism rate with some of the few cases identified being adopted kids who were vaccinated or instances where a mother was coerced into vaccinating her kid. Another example is Somalian refugees who don't have a concept of autism in their own country but who have it at rates doubling the American mean when they are dosed up by the recent standard CDC schedules. This dovetails with the recent CDC whistleblower case where a 300%+ rise in autism was discovered in Black kids but the study protocols were changed and hard-copy data was destroyed.
One way or another, the CDC and pharma seem to have zero interest in doing and vax vs. non-vax total health outcome studies (autism being but one of many issues which are suggested to be associated with vaccines and their schedules.) Such a study would be an obvious and fairly easy first step and analysis of the situation. The argument from corp/gov seems to be that such a study would be 'unethical'. Various less rigorous (and thus affordable) investigations of the vax vs. non-vax outcomes are stunning.
In my own family I recognize an interesting and discouraging rate of maladies of one form or another in the generation who were born after 2000. No autism, but one kid seems to have an Asperger's-like thing going on. Mostly it is metabolic maladies. Interestingly, the affluent families are the ones who have the worst 'batting average'... but they are also the ones who can best afford it. From an engineering perspective I would say that it is a good illustration of 'social justice'. Whether it is by accident or design I cannot say due to small data set size among other reasons.