US President Donald Trump on Monday vehemently insisted that pregnant people should "tough it out" and avoid Tylenol over an unproven link to autism, and urged major changes to the standard vaccines administered to babies.

The Republican leader's announcement rife with sweeping yet unsubstantiated advice came as the White House has vowed to revolutionize health in the United States, and as experts across medicine and science voice broad concern over the administration's initiatives that appear intent on unraveling decades of medical consensus.

Medical groups including The American College of Obstetricians and Gynecologists have long cited acetaminophen -- the primary ingredient in Tylenol -- as among the safest painkillers to take during pregnancy.

But Trump, who hammered on his message

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