Tracy Fischer (IMAGE) Tulane University Caption Tracy Fischer, PhD, lead investigator and associate professor of microbiology and immunology at the Tulane National Primate Research Center Credit Tulane University, Paula Burch-Celentano Usage Restrictions Use granted for articles that reference the research 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.