In this Monday, July 27, 2020, file photo, Nurse Kathe Olmstead, right, gives volunteer Melissa Harting, of Harpursville, N.Y., an injection of a possible COVID-19 vaccine, developed by the National Institutes of Health and Moderna Inc., in Binghamton, N.Y. The U.S. is poised to give the green light as early as Friday, Dec. 18, to a second COVID-19 vaccine, a critical new weapon against the surging coronavirus. Doses of the vaccine developed by Moderna Inc. and the National Institutes of Health will give a much-needed boost to supplies as the biggest vaccination effort in the nation’s history continues.(AP Photo/Hans Pennink, File)
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