Table 7.

Minimal Effective Concentration for HAI activity.

H1N1 strain	Pre vaccination		Post vaccination
	Geo Mean (ng/ml)	(±SD)	Geo Mean (ng/ml)	(±SD)
Total Ig Serum	107.6a	3.34	28.7b,c	2.30
IgG Serum	90.93a	3.26	20.85b,c	2.34
IgA serum	16.28b	3.75	7.26d	2.46
Purified IgG	52.07a,c	2.48	70.71a,c	1.63
Purified IgA	85.59a	1.96	58.12a,c	3.07
HA-specific purified IgG	0.91d	3.58	2.63d	5.21
HA-specific purified IgA	1.85d	4.15	1.93d	5.20

N = 10, 5 young (18–35 y.o.), and 5 elderly (>65 y.o.) subjects.

^a−dPaired two-way ANOVA grouping.