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Honda, Hideo; Shimizu, Yasuo; Rutter, Michael – Journal of Child Psychology and Psychiatry, 2005
Background: A causal relationship between the measles, mumps, and rubella (MMR) vaccine and occurrence of autism spectrum disorders (ASD) has been claimed, based on an increase in ASD in the USA and the UK after introduction of the MMR vaccine. However, the possibility that this increase is coincidental has not been eliminated. The unique…
Descriptors: Incidence, Autism, Immunization Programs, Foreign Countries