Safety and immunogenicity of a modified COVID-19 mRNA vaccine, SW-BIC-213, as a heterologous booster in healthy adults: an open-labeled, two-centered and multi-arm randomised, phas... oleh Yu-Zhou Gui, Xue-Ning Li, Jing-Xin Li, Ming-Yun Shen, Mei-Wei Zhang, Ye Cao, Hong-Rong Xu, Hui Li, Jie Cheng, Liang Pan, Ying-Lei Yi, Li-Yu Liang, Cheng-Yin Yu, Gang-Yi Liu, Chen Yu, Bi-Jie Hu, Feng-Cai Zhu, Fei Liang, Haifa Shen, Jing-Ying Jia, Hang-Wen Li, Jian Zhou, Jia Fan