In this March 15, 2021, file photo, a nurse handles a package of refrigerated COVID-19 vaccine doses from Chinese company Sinovac, in Hangzhou in east China's Zhejiang province. UNICEF told The Associated Press that North Korea has proposed its allotment of almost 3 million Sinovac doses from the COVAX immunization program instead be sent to countries with severe COVID-19 outbreaks. (Chinatopix via AP, File)
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