I am a mathematician/statistician by training. Before joining LSHTM in 1985 I worked as a school teacher and as a statistician at the UK Department of Energy.
The main focus of my research over the past 20 years has been on child health in low income settings. In recent years I have had a strong focus on neonatal health. Current/recent field research includes work on neonatal survival in Pakistan and Ethiopia, and on child survival in Burkina Faso. I have also been involved in work to improve global estimates of cause-specific neonatal mortality as a member of the Child Health Epidemiology Reference Group. In addition to this work in low income settings, I have, since 1986, been involved in research into Creutzfeldt-Jakob disease in the UK, working closely with the National CJD Surveillance Unit in Edinburgh since its inception in 1990. Methodological work includes research into causal inference in epidemiology and into improving approaches to quantifying uncertainty in disease burden estimates.