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BEIJING (BLOOMBERG) - Concern is mounting that China s Covid-19 vaccines are less effective at quelling the disease, raising questions about nations from Brazil to Hungary that are depending on the shots and the country s own mammoth inoculation drive. While vaccines developed by Pfizer, Moderna and even Russia s Sputnik have delivered protection rates of more than 90 per cent, Chinese candidates have generally reported much lower efficacy results. Research released on Sunday showed that the rate for Sinovac Biotech s vaccine - deployed in Indonesia and Brazil - was just above 50 per cent, barely meeting the minimum protection required for Covid-19 vaccines by leading global drug regulators.

United statesTherese heskethBenjamin cowlingGeorge fu gaoUniversity college londonSinovac biotechUniversity of hong kongChinese centre for disease preventionOxford universityChinese centreDisease preventionGlobal timesUniversity collegeProfessor benjamin cowlingCovid 19ஒன்றுபட்டது மாநிலங்களில்