highly significantp < 0.001
We observed a highly significant correlation between mean IgG IF and the amount of M-CAI (Spearman’s ρ = 0.417, p < 0.001), R-CAI (Spearman’s ρ = 0.484, p < 0.001), and Z-CAI (Spearman’s ρ = 0.562, p < 0.001) as well as the frequency of single virus-CAI positivity ( Table 2 , Figure 1 , Supplementary Tables S2 and S5 ). 3.3.