Fig. 7: Peripheral cytokines and SARS-CoV-2-specific humoral immunity.

a IFN-α peripheral concentration expressed in pg/mL. b IL-6 peripheral concentration expressed in pg/mL; Spearman’s correlation between peripheral cytokines and SARS-CoV-2-specific humoral response at T0 in the overall cohort (c), at T1 in the overall cohort (d), at T0 in EPS- individuals (e), at T1 in EPS- individuals (f), at T0 in EPS+ individuals (g), and T1 in EPS+ individuals (h). Red/blue dots: individual values; red/blue lines connecting median values at T0 and T1; longitudinal analyses (T1 compared to T0): Wilcoxon signed-rank test (P values in red/blue); cross-sectional analyses (at each time point): Mann–Whitney U test (P values in black); EPS− (T0, T1): n = 9, 10; EPS+ (T0, T1): n = 10, 10; heatmap of correlations: number in each cell represent the r value, bold-underlined number in each cell represents statistically significant r value; dotted lines: median of 7 pre-pandemic healthy controls. Statistical significance at p-value < 0.05.