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FILE - In this file photo dated Wednesday, Sept. 2, 2020, University of Miami Miller School of Medicine lab technician processes blood samples from volunteers taking part in testing the NIH funded Moderna COVID-19 vaccine in Miami, USA. Britain said Sunday Nov. 29, 2020, it has secured 2 million more doses of a promising coronavirus vaccine developed by US firm Moderna, as the country aims to launch an inoculation program within days. (AP Photo/Taimy Alvarez, FILE)