Fig. 2

Boxplot of IgM and IgG serological measurements across the groups identified by the results of rapid tests in relation with a (A) qualitative (positive-negative) or (B) semiquantitative interpretation (N – Negative test; WP – Weak positive test; P – Positive test). Legend: Bold line reports the 10 U/ml definite as cutoff for negative serological tests. Comparisons were made using Mann Whitney U test between two groups and Kruskal-Wallis test among three groups. Legend Fig. 2B: all pairwise comparisons have a statistical significance p < 0.001. Bonferroni correction was applied