Table 1.

Inter-assay Pearson correlations for H1N1 vaccine strains.

Timepoint	IgA/IgG (μg/ml)	IgA(μg/ml)/ Log2(HAI Titer)
14_D0	0.53***	ns
14_D21	0.62***	ns
15_D0	0.36**	−0.32*
15_D21	ns	ns
16_D0	0.57***	−0.37*
16_D21	0.51 ***	ns

n = 59 (24 young + 35 Elderly);

^*p < 0.05,

^**p < 0.001,

^***p < 0.001.