If vaccines cause autism, then why aren't there more people who have autism?

Because vaccines don’t cause autism.  There are idiot parents out there that think polio was a hoax and every time they have a kid who is seriously sick they blame us (nurses and doctors).  I can’t say it to them but in the back of my mind, it’s there...you deserve to get polio.

Because vaccinations don't cause Autism.

Vaccines do not cause autism. That's just a rumor from anti/vaxxers.

Because they don't cause autism.  That so-called study had a total of 8 kids as their population group, had a bunch of falsified data, and was pushed by a quack doctor who at the same time was starting up a company selling "autism test kits" as well as another company that sold vaccines with an alternative preservative to thimerisol which he claimed was causing the autism.  That's some huge conflict of interest right there.  Due to his actions and the resulting epidemics of measles, mumps, rubella, and other preventable diseases from parents suddenly too afraid to vaccinate their kids, he had his medical license revoked and he was banned from practicing medicine in all of Europe.

Vaccines don't cause autism. This has been scientifically proven. The conspiracy theory that they do is based on more people having autism, based on the incidence of autism going from 1 in 600 to 1 in 45 over the past 50 years, but what these conspiracy theorists fail to realize or acknowledge is that correlation isn't causation and that the actual reason for the increase has to do with the redefining of autism in the Diagnostic and Statistical Manual of Mental Disorders, specifically the adding of four new types of autism, most especially adding Asperger's syndrome and the autistic spectrum to the definition of autism, which 50 years ago only included what is now called Kanner's syndrome, otherwise known as "classic autism," and had no spectrum but merely was a listing diagnosis as there weren't varying levels of severity but rather one profound severity that either one had or didn't, met the criteria for or didn't.