The number of autism cases in the United States appeared to jump dramatically in 2014 according to new estimates released Friday, but researchers said that changes in the format of the questionnaire likely affected the numbers.
The report from the Centers for Disease Control and Prevention and National Center for Health Statistics shows that the prevalence of autism in children ages 3 to 17 went up nearly 80 percent from 2011-2013 to 2014. Instead of 1 in 68 children having autism -- a number that has alarmed public health...
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