Tristan Clark is a Professor and Honorary Consultant in Infectious Diseases at the University of Southampton and University Hospitals Southampton NHS trust. His research involves the assessment of diagnostic accuracy, usability, and clinical impact of novel rapid diagnostic tests for infections. He has been awarded grant funding from NIHR, Research Councils, EU, and Industry and has published results of his trials in The New England Journal of Medicine and Lancet series journals. During the COVID-19 pandemic he has acted as an advisor to the UK Department of Health and Social Care. The aim of his research is to improve patient care and experience through the evidence-based use of rapid diagnostic tests for infection.