Four Chinese COVID-19 vaccines undergoing phase-3 clinical trials

A staff member displays samples of the COVID-19 inactivated vaccine at Sinovac Biotech Ltd., in Beijing, capital of China, March 16, 2020. (Xinhua/Zhang Yuwei) BEIJING, Aug. 28 (Xinhua) — Four Chinese COVID-19 vaccine candidates have started international phase-3 clinical trials, according to the State Council joint prevention and control mechanism against COVID-19. Some of the phase-3 trials are expected to complete the first round of vaccinations in early September, with preliminary data expected as early as November. Phase-3 clinical trials usually involve thousands of people to verify the safety and effectiveness of the vaccines, which are key to their market…