Barbaresi et al again clearly document the increased incidence of autism, with its first appearance in the 1980-1983 group (Table 2).1 The increase is shown with 1 slope from 1980 through 1991 and a distinctly increased rate of autism from 1991 through 1997. They repeated the belief that “the timing of the introduction of the MMR [measles-mumps-rubella] vaccine [in 1971] did not coincide with the increased incidence of autism,”1(p42) referencing 5 studies that failed to demonstrate a relationship. However, attention has been focused more on the measles connection and the flawed assumption that the MMR vaccine has remained unchanged since its introduction in 1971.
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