Two recent studies estimated autism prevalence among children in the United States in 2016; both estimate the current prevalence at 2.5%, or one in every 40 children ages 3 to 17. The estimates are based on parent responses to the 2016 National Survey of Children’s Health (NSCH), a nationwide, population-based, cross-sectional survey, directed by the Health Resources and Services Administration’s (HRSA) Maternal and Child Health Bureau, and conducted by the US Census Bureau. Among the survey respondents, the weighted prevalence of a child ever having had a diagnosis of autism spectrum disorder (ASD) was 2 . . .