Health Secretary Robert F. Kennedy Jr. suggested there may be a link between autism and circumcision while reasserting the unproven theory that Tylenol causes the disorder — and medical experts are pushing back against the claims.   "There's two studies that show children who are circumcised early have double the rate of autism. It's highly likely because they are given Tylenol," Kennedy stated during a Cabinet meeting on Thursday. Circumcision is a surgical procedure that removes the foreskin