FILE PHOTO: Moderna’s COVID-19 vaccine at the McKesson distribution center

FILE PHOTO: Moderna's COVID-19 vaccine at the McKesson distribution center in Olive Branch, Mississippi

FILE PHOTO: Boxes containing the Moderna COVID-19 vaccine are prepared to be shipped at the McKesson distribution center in Olive Branch, Mississippi, U.S. December 20, 2020. Paul Sancya/Pool via REUTERS/File Photo