Primary Prevention participant brain scan (IMAGE) WashU Medicine Caption Hannah Richardson, 24, undergoes a brain scan as part of the Primary Prevention Trial for Alzheimer’s disease led by Washington University School of Medicine in St. Louis. Richardson comes from a family with a history of early-onset Alzheimer’s. Credit Matt Miller/WashU Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/multimedia-use/ for more information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.