Danish study finds no causal relationship between MMR vaccine and autism

Danish researchers from the Danish Epidemiology Science Centre at the University of Aarhus and the Statens Serum Institute in Copenhagen found no increased risk of autism among children who had been given measles, mumps, and rubella vaccine (MMR) compared to children who were not vaccinated (1). The study, which was very large, and the first to use a population based cohort design, adds further evidence for the absence of any causal relationship between MMR vaccine and autism. It is thus in agreement with other studies designed to evaluate the suggested link (2-4).