In this photo released by Xinhua News Agency, a medical worker injects a man with a COVID-19 vaccine at a healthcare center in Beijing, China, Saturday, Jan. 2, 2021. China authorized its first homegrown COVID-19 vaccine for general use on Dec. 31, 2020, adding another shot that could see wide use in poorer countries as the virus surges back around the globe. (Peng Ziyang/Xinhua via AP)
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