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Maria Irene Ramirez (R), head of nursing at the intensive care unit of the Ruben Lenero Hospital in Mexico City, receives the first COVID-19 vaccine at the General Hospital in Mexico City, Mexico, on Dec. 24, 2020. Mexico on Thursday kicked off its vaccination campaign against the COVID-19, with a vaccine developed by U.S. laboratory Pfizer and its German partner BioNTech. (Photo by Luis Licona/Xinhua)
