Trump, who said he's studied the issue, wants changes like fewer infant shots to test if autism rates drop, while critics call the claims unproven and public health groups warn of disease risks.
Michael McKeonRFK Jr. cited a 2015 Danish study of over 340,000 boys showing circumcised ones 46% more likely to get an autism diagnosis by age 10, though experts note limitations and no causal proof, dismissing links to circumcision, Tylenol, or vaccines.