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A medical worker receives an injection of the COVID-19 vaccine at the San Filippo Neri Hospital in Rome, Italy, Dec. 28, 2020. (Photo by Alberto Lingria/Xinhua)
A medical worker receives an injection of the COVID-19 vaccine at the San Filippo Neri Hospital in Rome, Italy, Dec. 28, 2020. (Photo by Alberto Lingria/Xinhua)