Research into a possible link between neurological conditions like autism and the use of acetaminophen, the active ingredient in Tylenol, during pregnancy have produced conflicting results. "We also know that fevers in pregnancy, in the second and third trimester especially, can increase risk for having a child with neuro-developmental delay. Kenvue, the New Jersey company that makes Tylenol, believes "sound science clearly shows that taking acetaminophen does not cause autism," spokesperson Melissa Witt told the New York Times. "We strongly disagree with any suggestion otherwise and are deeply concerned with the health risk this poses for expecting mothers and parents." Trump and Kennedy also repeated false claims about vaccines during their remarks Monday, including a disproven claim that vaccines cause autism.