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A medical worker prepares COVID-19 vaccine injection in Moscow, Russia, on Dec. 5, 2020. Moscow mayor Sergei Sobyanin announced Friday that the Russian capital city has launched its mass immunization program against the coronavirus. Medical workers, teachers, and social services employees will be the first to receive the vaccines as they belong to the most vulnerable groups, and over 5,000 people have already signed up for the shot, Sobyanin said on his blog. (Photo by Alexander Zemlianichenko Jr/Xinhua)
