Dr. Rafi Ahmed is the Georgia Research Alliance Professor of Microbiology and Immunology, and Director of the Emory Vaccine Center at Emory University School of Medicine in Atlanta, GA. His research efforts are directed towards: 1. Understanding the mechanisms of immunological memory and using this knowledge to develop new and more effective vaccines. 2. Defining the mechanisms of T cell exhaustion during chronic viral infections and cancer and developing strategies for restoring function in exhausted T cells. Dr. Ahmed is a member of the National Academy of Sciences and the National Academy of Medicine.