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In a recent lecture Chris Whitty, England’s chief medical officer, talked about how setbacks driven by misinformation can be temporary and how evidence and data can rebuild confidence. He was speaking at the London School of Hygiene and Tropical Medicine on the history of misinformation and health (doi:10.1136/bmj.r2338).1 Those sentiments might be applied to new research published this week—a rapid review that finds no support for Donald Trump’s sensational views on paracetamol (acetaminophen), known by the brand name Tylenol in the US. Paracetamol taken in pregnancy, claimed the US president, was responsible for the exceptional rise in autism diagnosis seen in recent decades (doi:10.1136/bmj.r2025).2