Table 1 Humoral immunogenicity outcomes against wild-type SARS-CoV-2 after the third dose of BNT162b2 in the evaluable analysis population

From: Antibody and T cell responses against wild-type and Omicron SARS-CoV-2 after third-dose BNT162b2 in adolescents

 

Adolescents three doses

Adults three doses

S IgG on ELISA

N

28

28

GM-OD450 value (95% CI)

1.39 (1.32–1.48)

1.44 (1.40–1.48)

% positive (≥LOD at 0.3)

100%, P > 0.9999

100%

S-RBD IgG on ELISA

N

28

33

GM-OD450 value (95% CI)

2.89 (2.85–2.93)

2.93 (2.85–3.01)

% positive (≥LOD at 0.5)

100%, P > 0.9999

100%

S-RBD ACE2-blocking antibody on sVNT

N

25

33

GM % inhibition (95% CI)

97.1% (97.0–97.2%)

97.0% (96.9–97.1%)

% positive (≥LOQ at 30%)

100%, P > 0.9999

100%

Neutralising antibody on PRNT

N

14

14

GM-PRNT90 (95% CI)

263 (218–317)

215 (166–279)

% positive (≥LOD at 10)

100%, P > 0.9999

100%

GM-PRNT50 (95% CI)

320 (320–320)

320 (320–320)

% positive (≥LOD at 10)

100%, P > 0.9999

100%

S IgG avidity on ELISA

N

28

28

GM avidity index (95% CI)

88.8% (85.8.8–91.9)

81.0% (77.7–84.4)

S IgG FcγRIIIa-binding on ELISA

N

28

28

GM-OD450 value (95% CI)

1.90 (1.86–1.93%)

1.87 (1.85–1.89%)

% positive (≥LOD at 0.28)

100%, >0.9999

100%

  1. P values compare the proportion of positive responses between adolescents and adults by Fisher’s exact test
  2. S spike protein, ELISA enzyme-linked immunosorbent assay, GM geometric mean, OD optical density, LOD limit of detection, LOQ limit of quantification, CI confidence interval, RBD receptor-binding domain, ACE-2 angiotensin-converting enzyme-2, sVNT surrogate virus neutralisation test, PRNT plaque reduction neutralisation test, PRNT90 90% plaque reduction neutralisation titre, PRNT50 50% plaque reduction neutralisation titre, FcγRIIIa Fc gamma receptor IIIa