1 in 10,000 in 1970 in the US
today 1 in 150 (1 in 90) for boys

vaccination

AUTISM PREVALENCE in the United States has soared. In 1970, Treffert et. al. published the first known
autism prevalence study in the United States, Epidemiology of Infantile Autism, with an autism prevalence rate
of less than 1 per 10,000. In 1987, Burd et. al. published a study, A prevalence study of pervasive developmental
disorders in North Dakota, showing an autism rate of 3.3 per 10,000. In 2007, the Centers for Disease Control's
Autism and Developmental Disabilities Monitoring Network released data showing that prevalence of
autism had grown to 66 per 10,000 or 1 in 150, an increase of more than 6,000% from the 1970 study.