Diana is a paediatrician and Professor of Epidemiology and Clinical Trials at MRC Clinical Trials Unit at University College London. Over the last 30 years Di has set up and coordinated a network of clinical trials and cohorts across Europe, Thailand and South America mainly within paediatric HIV infection. This work expanded to Sub-Saharan Africa in the early 2000s where she has undertaken large multi-country trials to address strategy questions in adult and paediatric HIV, more recently expanding to India and South Asia, and into other diseases including tuberculosis, malaria and bacterial infections.
Di is a founder of Penta and vice-chair of the Penta Foundation Board. She has served on Wellcome Trust and MRC research boards as well as WHO advisory and guideline committees. In 2019 she was presented with an honorary doctorate from the University of York and in 2020 was made a fellow of the UK Academy of Medical Sciences.