Exosomal IL-10 levels are related to PTSD symptoms (B = 0.8, t = 2.60, p < 0.01).IL-10 regression model (p < 0.01) shows PTSD sig. related (p < 0.01) and depression (p = 0.063) and PCS severity do not relate to exosomal IL-10 (p = 0.26). This evidence concerns the gene IL10 and major depressive disorder.