highly significantp < 0.0001
This reactivity pattern was similar for serum and saliva after the second and third vaccination with BNT and showed a highly significant correlation as seen in Figures 3E (r = 0.8879, p < 0.0001) and 3F (r = 0.7384, p < 0.0001). 3.3 Vaccination induces neutralizing IgG but not IgA in the saliva We further performed a neutralization assay with the authentic SARS-CoV-2 virus variant EU1/B.1.177 ( Figure 4 ).