Jay Evans in lab (IMAGE) The University of Montana Caption Jay Evans, director of the University of Montana Center for Translational Medicine, and his team expect to start Phase 1 human trials for fentanyl and heroin vaccines in 2024. Credit UM photo by Tommy Martino Usage Restrictions No restrictions. License Public Domain 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.