Jennifer Dan, MD, PhD (IMAGE) University of California - San Diego Caption Jennifer Dan, MD, PhD, is an infectious disease specialist and principal investigator for two clinical trials investigating the COVID-19 immune response of vaccinated transplant patients. Credit UC San Diego Health Sciences Usage Restrictions Use photo credit License Licensed 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.