Fig. 2: The pseudovirus NAb titer against prototype, BA.1, BA.2 and BA.4/5.

a–d Plasma from I-I-δ (n = 33), I-I-o (n = 22), M-M-o (n = 9) and I-I-I (n = 40) groups were assessed for pseudovirus NAb titers. e Comparison of NAb titers against prototype, BA.1, BA.2 and BA.4/5 among 4 groups. Geometric mean NT50 values and fold change were displayed at the top of plots; bars represented geometric mean ± 95% confidence interval (CI), and significance relative to each Pseudovirus was determined by Wilcoxon rank-sum test. *P < 0.05, **P < 0.01, ***P < 0.001. Dash line in a–c means that the limit of detection (LOD) of NT50 in I-I-δ, I-I-o, M-M-o groups was 30; dash-dotted line in d means that the LOD of NT50 in I-I-I group was 10.