Dr. Dan Littman is the Kimmel Professor of Molecular Immunology in the Department of Cell Biology at New York University and is a Howard Hughes Medical Institute Investigator. Dr. Littman’s laboratory has made multiple contributions toward our understanding of mechanisms that promote immune system development and roles in physiological homeostasis, particularly through interactions with microbiota and with cells of the peripheral and central nervous systems. Dr. Littman is a member of the U.S. National Academy of Sciences, the National Academy of Medicine, and the American Academy of Arts and Sciences, past president of the American Association of Immunologists, and recipient of several scientific awards, including the Ross Prize in Molecular Medicine and the Vilcek Prize in Biomedical Sciences