 I'm Sarah Gilbert and I'm Professor of Vaccinology at the University of Oxford. I've been working on the development of new vaccines against diseases that cause outbreaks and potentially can cause pandemics. Last year, at the beginning of 2020, I started work on a vaccine against the novel coronavirus that we now know as SARS-CoV-2 that causes the disease that we call COVID-19. And we worked very hard on the vaccine using technology that had been in development for about 10 years. The vaccine went into clinical trials by April and is now licensed for use in many, many countries around the world.