Mark M. Davis is the Director of the Stanford Institute for Immunology, Transplantation and Infection (ITI), a Professor of Microbiology and Immunology, and a Howard Hughes Medical Institute Investigator. He received a B.A. from Johns Hopkins University and a Ph.D. from the California Institute of Technology. He later was a postdoctoral and staff fellow at the Laboratory of Immunology at NIH and then became a faculty member in the Department of Microbiology and Immunology at Stanford University School of Medicine, where he remains today. Dr. Davis is well known for identifying many of the T-cell receptor genes, which are responsible for the ability of these cells to recognize a diverse repertoire of antigens. Current research interests involve understanding the molecular interactions that underlie T cell recognition and the challenges of human immunology, specifically a “systems level” understanding of an immune response to vaccination or infection.