Safety and immunogenicity of a protein subunit COVID-19 vaccine (ZF2001) in healthy children and adolescents aged 3–17 years in China: a randomised, double-blind, placebo-controlled, phase 1 trial and an open-label, non-randomised, non-inferiority, phase 2 trial

Lidong Gao, Yan Li, Peng He, Zhen Chen, Huaiyu Yang, Fangjun Li, Siyuan Zhang, Danni Wang, Guangyan Wang, Shilong Yang, Lihui Gong, Fan Ding, Mengyu Ling, Xilu Wang, Leilei Ci, Lianpan Dai, George F. Gao, Tao Huang, Zhongyu Hu, Zhifang Ying, Jiufeng Sun, Xiaohu Zuo