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SHARE Chinese Covid vaccine booster 'could upgrade shot against variants' There are concerns that vaccines being used around the world could be less effective against variants of the Covid-19 virus now being seen in the UK and South Africa A health worker prepares to administer the Sinovac vaccine against the Covid-19 coronavirus at Zainoel Abidin Hospital in Indonesia. AFP SHARE SHARE China's Covid-19 vaccines using the inactivated virus can be upgraded to cope with new variants in about two months, according to a Chinese medical expert. Shao Yiming, a scientist with the Chinese Centre for Disease Control and Prevention agency,...
