TY - RPRT TI - SARS-CoV-2 variants with mutations at the S1/S2 cleavage site are generated in vitro during propagation in TMPRSS2-deficient cells AU - Sasaki, M. AU - Uemura, K. AU - Sato, A. AU - Sanaki, T. AU - Maenaka, K. AU - Hall, W. W. AU - Orba, Y. AU - Sawa, H. PY - 2020 DO - 10.1101/2020.08.28.271163 UR - https://www.biorxiv.org/content/10.1101/2020.08.28.271163v1 ID - 10.1101/2020.08.28.271163 ER -