Chinese firm Sinovac Biotech Ltd (SVA.O) 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.
Health officials have been concerned about whether experimental vaccines could safely protect the elderly, whose immune systems usually react less robustly to vaccines, against the virus that has led to nearly 890,000 deaths worldwide.
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. The complete results have not been published and were not made available to Reuters.
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