US President Donald Trump and his Health Secretary, Robert F. Kennedy Jr., on Thursday promoted another fringe theory about autism -- this time linking it to circumcision or to pain medication given for the procedure.

The claim was swiftly derided by experts who said the main study cited by proponents of this theory was strewn with errors and it was yet another example of Kennedy's penchant for "pseudoscience."

"Don't take Tylenol if you're pregnant and when the baby is born, don't give it Tylenol," Trump said during a Cabinet meeting.

"There's two studies that show children who are circumcised early have double the rate of autism," chimed in Kennedy, adding: "It's highly likely because they're given Tylenol."

"None of this makes sense," Helen Tager-Flusberg, a professor at Boston Univ

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