Julia is Professor of Epidemiology and General Practice at the University of Oxford. Julia's research interests are very broad and include large scale clinical epidemiology, drug safety and the development of risk prediction algorithms using electronic databases from general practices. She is the co-founder of the QResearch database which is one of the largest clinical research databases worldwide. By 2022, it has doubled in size to to cover over 1500 GP practices, representing approximately 25% of the UK population. The database is also linked to hospital, mortality & cancer data, COVID test results, COVID-19 vaccination and ICNARC ICU data. She has developed and validated risk prediction algorithms for a range of diseases including cardiovascular disease, cancer fracture, diabetes and other conditions. These tools are now widely used across the NHS.