For how we live.
The largest study, comparing siblings to strip out family confounding, found no link between paracetamol in pregnancy and autism or ADHD. Guidelines still call it the preferred painkiller when one is needed.
Paediatric bodies advise formal autism screening at 18 and 24 months; a US task force found the evidence for universal screening merely insufficient, not against it. Large studies find no link to vaccines.
A 4.5-million-birth analysis found smoke exposure associated with higher birth weight, not lower. A separate cohort linked third-trimester smoke days to autism risk — but only when counting days, not concentration.