Michael Demetriou, MD, PhD (IMAGE) University of California - Irvine Caption Results from new study, led by Michael Demetriou, MD, PhD, may pave the way for new potential therapeutic targets to rejuvenate the immune system in older adults and thereby reduce their risk of infectious disease. Credit UCI/Steve Zylius Usage Restrictions N/A 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.