**2. What is the prevalence of autism?**

The most recent estimate from the Autism and Developmental Disabilities Monitoring (ADDM) ASD prevalence (1.46%) in 2012, with increase from 0.67% in 2000 to 1.47% in 2010. In a large, nationwide population-based study, the estimated ASD prevalence was 2.47% among US children and adolescents in 2014–2016, with no statistically significant increase over the 3 years [6].
