A staff member tests samples of the COVID-19 inactivated vaccine at a laboratory of Sinovac Biotech Ltd., in Beijing, capital of China, March 16, 2020. China has approved two COVID-19 inactivated vaccine candidates for clinical trials, according to the State Council joint prevention and control mechanism against the coronavirus Tuesday. The two vaccine candidates were developed by Wuhan Institute of Biological Products under the China National Pharmaceutical Group (Sinopharm), and Sinovac Research and Development Co., Ltd, a company based in Beijing. Clinical trials of the two vaccines have started. (Xinhua/Zhang Yuwei)
