Margaret Keenan, 90, is applauded by staff as she returns to her ward after becoming the first person in the United Kingdom to receive the Pfizer/BioNtech COVID-19 vaccine at University Hospital, at the start of the largest ever immunisation programme in the British history, in Coventry, Britain December 8, 2020. Britain is the first country in the world to start vaccinating people with the Pfizer/BioNTech jab. Jacob King/Pool via REUTERS