Program: PBS NewsHour
Episode: Autism Now: Exploring the 'Phenomenal' Increase in U.S. Prevalence

In the second report in his Autism Now series, Robert MacNeil investigates why the number of children with autism is increasing in the U.S. MacNeil meets children at different points on the autism spectrum and gets several views on the increase in prevalence -- from better diagnosis to a variety of environmental factors.

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