Andrew Yates is a Professor of Pathology & Cell Biology and a member of the Data Science Institute and of the Program for Mathematical Genomics at Columbia University. Andrew got his PhD in Theoretical Physics and Cosmology in 1996 at Imperial College London. Andy is a quantitative immunologist. His research integrates theoretical and computational tools with diverse experimental approaches to study the dynamics of lymphocytes, white blood cells that are key components of vertebrate immune systems. His group's aim is to develop a mechanistic understanding of the rules underlying lymphocyte development, homeostasis, and their trajectories in response to infectious challenge. Their philosophy is to confront and break models with data to search for parsimonious, robust and quantitative explanations of immunological phenomena. Currently they focus on the evolution of immune repertoires throughout an individual's lifespan, their recovery following hematopoietic cell transplants, the responses of HIV-infected infants to antiretroviral therapy, and the ecology of tissue-resident memory T cells in mice and humans.