Table 4.

Changes of anti-influenza A and B IgG antibodies during the study.

Study Cohort	Anti-Influenza A IgG, AI Mean (95% CI)	Anti-Influenza B IgG, AI Mean (95% CI)
Influenza vaccine
ABB C1® supplement
Baseline (n = 15)	2.29 (1.08–3.50)	2.35 (0.92–3.78)
Day 7 (n = 12)	2.41 (1.19–3.63)	1.95 (0.48–3.42)
Day 30 (n = 14)	2.22 (1.01–3.43)	2.31 (0.86–3.75)
Placebo
Baseline (n = 19)	2.67 (1.60–3.75)	2.54 (1.27–3.81)
Day 7 (n = 16)	2.37 (1.28–3.45)	2.42 (1.12–3.71)
Day 30 (n = 18)	2.26 (1.18–3.33)	2.42 (1.14–3.70)

AI: avidity index; CI: confidence interval.