Eugen Bleuler, a Swiss psychiatrist, was the first person to use the term. He started using it around 1911. The word "autism," which has been in use for about 100 years, comes from the Greek word "autos," meaning "self."4. Unfortunately autism has fallen into a mental disorder that is led by psychologists which in field of autism have been more damagefull that the autism itself.
Autism always WAS a psychiatric considered disorder, loooong before vaccines. It didn't just turn into a 'mental disorder' recently, however if you ask the private insurance companies it's not a medical disorder at all; it's an educational disorder.
If it wasn't for those 'blamed' psychiatrists', we'd not have the term autism at all.
Seems you don't know much about autism at all.