Additionally, moderate positive correlations were detected between pHERV-Wenv 486-504/syncytin-1env486-500 and HHV-6A/B IgM+ (N =18, r = 0.6, p = 0.009) and IgG+ (N = 44, r = 0.3, p = 0.05) levels in PP-MS patients (data not shown). Here, CD40LG is linked to myeloid sarcoma.