CXCL8 and major depressive disorder: To examine possible differences between concentrations of pro-inflammatory IL-6 or IL-8 with respect to MDD diagnosis and BoDV-1 status, two separate 2 × 2 ANOVAs with the factors “Group” (MDD patients vs. adults without MDD diagnosis) and “Status of BoDV-1 infection” (positive vs. negative) were conducted.