In this episode Eliot asks: what are vaccines, and how do they work? To answer this question, he speaks to Tony de Fougerelles, who was vital in developing the COVID-19 vaccine. Tony has spent decades hunting for new medicines and treatments for different illnesses. In this episode, he explains how new scientific developments are bringing effective treatments more rapidly than ever before. Tony also tells Eliot how years of illness as a child inspired him to get involved in helping others.