The bestselling inside story of a historic moment for science and for humanity. On 1 January 2020, Professor Sarah Gilbert read an article about four people in China with an illness of unknown cause. Within two weeks, she and her team had designed a new vaccine that would go on to save millions of lives from Covid-19. Capturing a landmark moment, Sarah Gilbert and Catherine Green reveal their story of making the pioneering Oxford AstraZeneca vaccine and fighting a pandemic as ordinary people in extraordinary circumstances. They separate fact from fiction, they explain how they made their highly effective vaccine in record time with the eyes of the world watching, and they give us hope for the future.