Recent discussions have brought back a dangerous and repeatedly debunked notion: that vaccines cause autism. For decades, extensive research in numerous countries has consistently found no credible link between lifesaving childhood vaccines and autism. Beyond vaccines, there also has been confusion about a supposed link between acetaminophen (the active ingredient in Tylenol) and autism, particularly when used during pregnancy. It’s unfair and untrue to blame mothers who followed their doctors’ advice and safely took Tylenol during pregnancy for their child’s autism. Acetaminophen (Tylenol) is widely considered to be the safest and most effective medication for reducing fever during pregnancy.