‘Uncompromising and Relentless’: HHS to Study All Possible Causes of Autism, Including Vaccines ‘Uncompromising and Relentless’: HHS to Study All Possible Causes of Autism, Including Vaccines September 23, 2025 by Michael Nevradakis, Ph.D. U.S. public health agencies are collaborating on extensive studies that will examine all the possible causes of autism, including vaccines, U.S. Health Secretary…