My research interests are broadly in the area of the epidemiology of vaccine-preventable diseases (VPDs), including measurement of disease burden pre vaccine introduction, measurement of immunisation coverage and measurement of the impact of vaccines post introduction. I also have a strong record in clinical vaccine trials and was the Chief Investigator for a multi-site national randomised vaccine trial of pertussis vaccine to newborns funded by the NHMRC. In my work on SAGE, I have been extensively involved in COVID-related policy work and wrote an overview piece with my SAGE colleagues on this in the Lancet published in January 2022. Other areas of interest include waning immunity to measles for which I have NZ HRC funding for a trial of nebulised MMR vaccine commencing in 2023.