Guest authors Professor Dame Sarah Gilbert is the Saïd Professorship of Vaccinology, based at the Pandemic Sciences Institute, University of Oxford. She was the Oxford Project Leader for ChAdOx1 nCoV-19, known as the Oxford-AstraZeneca vaccine against COVID 19. Sean Elias is Public Engagement with Research Lead for VaxHub, based at Oxford’s Pandemic Sciences Institute and has over a decade of experience working on vaccines and clinical trials.