Health professionals around the world are disputing the Trump administration’s claims about autism and its potential causes. U.S. Secretary of Health Robert F. Kennedy Jr., along with President Donald Trump himself, said this week that taking Tylenol while pregnant may cause autism in babies, and the U.S. FDA said it would reclassify the drug leucovorin — primarily used to mitigate chemotherapy side effects — to treat autism symptoms in children.
But the established, peer-reviewed research on autism and its causes does not support either of these claims — or a number of other statements made in that announcement. Health experts have called the claims premature, misleading, and even dangerous.
Deepa Singal, the scientific director of the Autism Alliance of Canada, explains what the science actually says about autism, why health professionals aren't changing their recommendations, and why autism is so hard to get definitive answers about in the first place.
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