Fig. 2

Geometric mean titers of neutralizing antibodies against different variants of pseudo SARS-CoV-2 virus before and after the booster vaccination. a–h. Neutralizing antibodies against different SARS-CoV-2 variants of pseudo virus. Bars and associated numbers represent geometric means, and boxes 95% CIs. **** p < 0.0001 (Unpaired two-sided Student’s t test). CI Confidence interval