Figure 2. Infectivity titers of sarbecoviruses from bats and humans used to investigate bat sarbecovirus Rc-o319, which is genetically related to human SARS-CoV-2, Japan. Cells expressing each host-origin angiotensin-converting enzyme 2 were inoculated with VSV pseudotyped with spike proteins of Rc-o319 (A), SARS-CoV (B), SARS-CoV-2 (C), or glycoprotein of VSV (D). At 20 hour postinfection, GFP-positive cells were counted and the infectivity titers were calculated. Error bars indicate SDs from 3 independent experiments. CoV, coronavirus; GFP, green fluorescent protein; Rc/Rf, chimera of Rhinolophus cornutus and R. ferrumequinum; SARS, severe acute respiratory syndrome; VSV, vesicular stomatitis virus.