Fact: The simple answer is no, they do not. Over the years, people have been concerned about the association of vaccines with autism spectrum disorder (ASD).
In 1998, it was the MMR vaccine controversy, of which further investigation has shown no association between ASD and the MMR vaccine.
Thimerosal, a common vaccine ingredient, was believed to be associated with ASD. In 2001 thimerosal was removed or reduced to trace amounts in almost all childhood vaccines.
However, there is no reduction in the incidence of ASD. The evidence favours that there is no relationship between vaccines containing thimerosal and autism rates in children.
In recent years, parents have been concerned that too many vaccines too soon may lead to autism.
However, a study in 2013 shows that the total amount of antigens from vaccines received was the same between children with ASD and those that did not have ASD, de-bunking this theory too.