Just 4% of Americans definitely believe – as President Donald Trump does – that taking Tylenol during pregnancy increases the risk of a child developing autism, a new KFF poll shows. In this photo, Trump, right, and Robert F. Kennedy Jr., US secretary of Health and Human Services (HHS), in the Roosevelt Room of the White House in Washington, DC, US, on Monday, Sept. 22, 2025. Trump said his administration was linking acetaminophen, the active ingredient in Tylenol, to autism and urging pregnant women to largely avoid the medication. Photographer: Francis Chung/Politico/Bloomberg © 2025 Bloomberg Finance LP

Just 4% of Americans definitely believe – as President Donald Trump does – that taking Tylenol during pregnancy increases the risk of a child developing autism, a new KFF poll shows.

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