Mark Jit works as both a Professor in Vaccine Epidemiology at the London School of Hygiene & Tropical Medicine, and also in the Modelling and Economics Unit of Public Health England. He teaches postgraduate and professional courses on modelling and economics of infectious diseases. His main research interest is in epidemiological and economic modelling of infectious disease control interventions to support evidence-based public health decision making. In particular, his work has helped inform immunisation policy on a range of vaccines (including HPV, pneumococcal, rotavirus and influenza vaccines) in both developed and developing countries.