Parents are rightly confused about vaccines, Tylenol, and autism right now. They just want to do what's right for their kids. Here's what to know: Vaccines are safeno link to autism Reaching for Tylenol when baby is fussy? Here's some information worth knowing. A baby's liver isn't fully mature until around 2 years old Meaning their ability to process certain substances is still A major Danish study of 1.5 million children found no link between Tylenol ( acetaminophen) use during pregnancy and autism, even after adjusting for dosage and timing. President Trump linked Tylenol taken by Vaccines do not cause autism. Neither does acetaminophen (Tylenol) use in pregnancy. Decades of rigorous research and systematic reviews have shown no credible link. Continuing to promote these myths is not only Acetaminophen's effects on vaccines Vital Record