GENEVA/BEIJING - The World Health Organisation is working with China on requirements for international approval of any Chinese Covid-19 vaccine, a senior official said on Monday .
Chinese firm Sinovac Biotech Ltd said on Monday its coronavirus vaccine candidate appeared to be safe for older people, according to preliminary results from an early to mid-stage trial, while the immune responses triggered by the vaccine were slightly weaker than younger adults. Sinovac's candidate CoronaVac did not cause severe side effects in a combined Phase 1 and Phase 2 trials launched in May involving 421 participants aged at least 60, Liu Peicheng, Sinovac's media representative, told Reuters.Four of the world's eight vaccines that are in the third phase of trials are from China.
CoronaVac, being tested in Brazil and Indonesia in the final-stage human trials to evaluate whether it is effective and safe enough to obtain regulatory approvals for mass use, has already been given to tens of thousands of people, including about 90% of Sinovac employees and their families, as part of China's emergency inoculation scheme to protect people facing high infection risk.
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