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Staffers transport CoronaVac vaccine produced by Chinese company Sinovac Biotech at Kiev Boryspil airport in Kiev, Ukraine, March 25, 2021. A plane with the first batch of CoronaVac vaccine produced by Chinese company Sinovac Biotech arrived in Ukraine on Thursday night amid the rapid surge of COVID-19 infections in the country. (Photo by Sergey Starostenko/Xinhua)