A nurse prepares the first dose from a vial of Moderna COVID-19 vaccine to be administered in Britain at the West Wales General Hospital in Carmarthen, Wales, Wednesday April 7, 2021. The Moderna vaccine is the third vaccine to be approved for use in the UK, which is to be given to patients in Wales from Wednesday, and the UK has so far ordered 17 million doses of the Moderna jab. (Jacob King/Pool via AP)