KATJA DOERHOLT MSc in Epidemiology, FRCPCH, is a Paediatric Infectious Diseases Consultant at St. George’s University Hospital, London, UK. Katja’s main interests are HIV, TB, antimicrobial stewardship. Katja has been leading the paediatric OPAT service at St. George’s University Hospital and set up the national paediatric database. She has an interest in clinical trials and works as a clinical trial physician at the UCL Medical Research Council Clinical Trials Unit.