Figure 2 (A) Increase of Delta (δ)- and Omicron (ο)-
BA.1/BA.2 neutralizing antibody (NA) titers after mRNA booster in age-
and gender-matched individuals pre-vaccinated with AZD/mRNA (N=5),
AZD/AZD (N=5), and mRNA/mRNA (N=5). δ- and ο-BA.1/BA.2-NA titers after
BA.1 (breakthrough) infection in triple-vaccinated and unvaccinated
individuals. (B, C) δ- and ο-BA.1 NA titers and CD4+ or
CD4/CD8+ T-cell reactivities before/after BA.1 (breakthrough) infection.
Geometric mean titers (GMT), prevalence of NAs >1:10 or
number of individuals tested are tabulated. ****: p < 0.0001;
***: p < 0.001 **: p < 0.01; * p < 0.05.
Horizontal dashed lines indicate test cut-off values.