After studying only eight participants, there was a report published in 1998 that linked the Measles, Mumps and Rubella vaccine with Autism. However, since that report, worldwide studies have proven no link between the two. In fact, 10 out of 13 authors of the original paper have retracted their conclusion on the link with autism.
Many blamed mercury, which is used to prevent bacterial contamination of the vaccine, however, since it’s precautionary removal from vaccines, autism rates have actually increased.
Overall, there is no evidence that link the MMR vaccine and autism.