There’s quite a bit of reporting that a study on the incidence of autism in Yokohama found that after the MMR was withdrawn across Japan in 1993 the rate of Autism doubled, meaning that there cannot be a causal link between the MMR and the large rise in cases of Autism.

Of course, this does not say that there cannot be individual cases caused by MMR, perhaps due to an underlying immune condition that means the body cannot cope with it!