The concordance between the evolutionary trend and the clinical manifestation of the two SARS-CoV-2 variants. Issue 8 (28th May 2021) - Hu, Ben; Liu, Ran; Tang, Xiaolu; Pan, Yuchen; Wang, Ming; Tong, Yongqing; Ye, Guangming; Shen, Gaigai; Ying, Ruochen; Fu, Aisi; Li, Di; Zhao, Wanxu; et al.