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Getting to know China's COVID-19 vaccines
03:16

According to the World Health Organization (WHO), nine out of 300 vaccine candidates worldwide are in phase-3 human trials. Four of those are being produced in China by Sinovac Biotech, private firm CanSino Biologics, state-owned Sinopharm Group, and China National Biotec, which is a part of Sinopharm. 
Here we explain the nuts and bolts of these Chinese vaccines.
 

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