Fact-Checking Peter Marks’ ‘Face the Nation’ Interview on Autism, Vaccines and Measles By Arthur Weinstein | The Defender | April 17, 2025 Marks, M.D., Ph.D., hasn’t changed the opinions that put him at odds with U.S. Health and Human Services (HHS) Secretary Robert F. Kennedy Jr., and led to his recent resignation from the U.S. Food and Drug Administration (FDA).