Nicolas Hulscher wrote: "Although most of the spotlight fell on Tylenol, the evidence is undeniable: acetaminophen is NOT the root cause. At most, it weakens defenses and heightens vulnerability. The true trigger — then and now — is VACCINES." He provided scientific studies for evidence.

There are no case reports of regression to autism from acetaminophen alone. By contrast, there are thousands of parental reports and multiple peer-reviewed studies documenting developmental regression after vaccination.