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A worker transports Sinopharm COVID-19 vaccines at the Phnom Penh International Airport in Phnom Penh, Cambodia, March 31, 2021. A special plane carrying a new batch of China-donated Sinopharm COVID-19 vaccines arrived in the capital of Cambodia Wednesday night, giving the country bigger possibility to inoculate its citizens against COVID-19. (Photo by Gao Bingnan/Xinhua)