Stephen Jolles is a Consultant Clinical Immunologist and Honorary Professor at the University Hospital of Wales. He is the Clinical Lead at the Immunodeficiency Centre of Wales and Co-Director of the Hub Immunology Diagnostic Laboratory of Wales. Dr. Jolles trained in immunology and allergy and obtained his Ph.D. on Langerhans cell migration at the National Institute for Medical Research, London. He has a particular interest in the clinical use of immunoglobulin and its mechanism of action and his research interests include the development of new therapeutic products, new screening strategies to improve the laboratory diagnosis of primary and secondary immunodeficiency and allergy, and better ways to monitor primary and secondary immunodeficiency disease and the impact of treatments.