Fig. 3

Mouse antisera inhibited SARS-CoV-2 S protein-mediated cell–cell fusion. a SARS-CoV-2 S protein-mediated cell–cell fusion inhibited by sera from day 35 at a dilution of 100. b The IT₅₀s of sera from day 35 against SARS-CoV-2 S protein-mediated cell–cell fusion