FILE - A man stands outside an entrance to a Moderna, Inc., building, Monday, May 18, 2020, in Cambridge, Mass. A second COVID-19 vaccine moved closer to joining the U.S. fight against the pandemic Thursday, Dec. 17, 2020 as government experts convened for a final public review of its safety and effectiveness. The shot from Moderna and the National Institutes of Health is urgently needed as the country continues to record ever-higher numbers of new cases, hospitalizations and deaths ahead of more holiday travel and family gatherings. FDA's OK is expected shortly after the all-day meeting concludes. (AP Photo/Bill Sikes, file)
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