Autistic Disorder and MMR Vaccinations

Autistic Disorder and MMR Vaccinations

Some have suggested that there is a variant of ASD called autistic enterocolitis that involves developmental regression and gastrointestinal symptoms, and that this variant is a conse-quence of measles–mumps–rubella (MMR) immunization. This hypothesis, which has been postulated to account for the rise in the number of cases of ASD, suggests that there are specific biological findings in these children that result from a persistent measles viral infection. At the current time, investigations into this hypothesis have shown no relationship between MMR vacci-nations and the development of ASD; this lack of evidence argues against changes in MMR vaccination programs.