4 Wuhan Institute of Biological Products Co. Ltd, Wuhan, China.
5 China National Biotec Group Company Limited, Beijing, China.
6 Research Laboratory of Clinical Virology, Ruijin Hospital and Ruijin Hospital North, National Research Center for Translational Medicine, Shanghai Jiao Tong University of Medicine, Shanghai, China. zhangx@shsmu.edu.cn.
7 China National Biotec Group Company Limited, Beijing, China. yangxiaoming@sinopharm.com.