Sinovac becomes 2nd Chinese vaccine greenlighted by WHO for emergency use Hu Yuwei Published: Jun 01, 2021 10:50 PM Sinovac staff members on COVID-19 production line Photo: Hu Yuwei/GT As the US keeps making promises without actual moves and India, a previous major global vaccine manufacturer, is struggling to fulfill their production contracts amid the serious domestic COVID-19 epidemic, China is taking the leading role to support the global anti-pandemic fight in expanding international supply as much as possible, providing reliable doses with impressive protection data. The World Health Organization (WHO) on Tuesday greenlighted COVID-19 vaccine produced by China's Sinovac for emergency use, which is a prerequisite to become a provider for COVAX.