Jessica N. Lancaster, Ph.D., investigates age-associated alterations to the immune system. Dr. Lancaster's research focuses on the development and response of T cells and B cells, members of the immune system that are exquisitely tailored to their targets and are essential for resolving infectious threats. Using advanced live-cell imaging, Dr. Lancaster directly visualizes T and B cells as they interact within their organ microenvironments in order to understand how communication within the immune system breaks down with age.