Delta spike P681R mutation enhances SARS-CoV-2 fitness over Alpha variant
Yang Liu, Jianying Liu, Bryan A. Johnson, Hongjie Xia, Zhiqiang Ku, Craig Schindewolf, Steven G. Widen, Zhiqiang An, Scott C. Weaver, Vineet D. Menachery, Xuping Xie, Pei-Yong Shi
bioRxiv 2021.08.12.456173; doi: https://doi.org/10.1101/2021.08.12.456173