Levels of CMV-IgM were significantly increased in MDA5+ DM patients compared with MDA5− IIM patients (8 U/mL, IQR 5–14 U/mL vs. 6 U/mL, IQR 5–10 U/mL, p = 0.039) (Figure 2A). The gene discussed is CD40LG; the disease is dermatomyositis.