Fig. 1. Neutralizing activity of human post-vaccination sera against Omicron BA.1 and BA.2.

(A-C) Neutralization titers against 614G, Delta, Omicron BA.1 and Omicron BA.2 of vaccinated individuals after vaccination with one (A), two (B) or three (C) doses of BNT162b2. Geometric mean is displayed above each graph. PRNT50: plaque reduction neutralization titers resulting in 50% plaque reduction. Dotted lines indicate limit of detection. One way ANOVA was performed for statistical analysis. *p<0.05. N=10.