There is no real link between MMR vaccine and
autism. The only thing that was a cause
for concern with childhood vaccinations was a mercury based preservative called Thimerosal. Studies Even showed that that didn't even have a direct link with an increased chance of autism developing in children but just to be safe the FDA banned it from being used in childhood vaccinations. I believe by 2001, if not earlier, all childhood vaccinations no longer contained that ingredient.