Gerhard Walzl is a clinician scientist, trained in internal medicine, pulmonology and immunology, and leads the Stellenbosch University Immunology Research Group. He is head of the Division of Immunology, Executive Head of the Department of Biomedical Sciences, and holds a NRF SARChI award on TB biomarkers. His research focuses on the immunology of Mycobacterium tuberculosis (MTB) infection and in particular host biomarkers, including diagnostic markers, markers of TB treatment response and markers of protective immunity against MTB. His research spans the divide between clinical and basic sciences in a high TB prevalence area.