I am Professor of Medical Microbiology at the University of Liverpool and Honorary Consultant Microbiologist, Alder Hey Children’s NHS Foundation Trust. Following graduation from the University of Manchester Medical School in 1988, I trained as a clinical microbiologist in Edinburgh and Liverpool and obtained my PhD from the University of Liverpool in 2001. My research interest is the epidemiology and prevention of diarrhoeal disease in children. Since the award in 1996 of a Wellcome Trust Research Training Fellowship in Clinical Tropical Medicine, I have led a long-term programme of rotavirus research in children in Malawi. This included a pivotal, Phase III clinical trial of human rotavirus vaccine which resulted in a global rotavirus vaccine recommendation by WHO. My work has been published in leading medical journals including the New England Journal of Medicine, the Lancet and Lancet Infectious Diseases.