However, when we analyzed the titers of the IgG and IgM antibodies against those viruses, we found statistically significant differences for HHV-6A/B IgG, EBNA-1 IgG, VCA IgG (all of them higher in MS patients) and CMV IgG (higher in HC) (Figure 2A). Here, CD40LG is linked to myeloid sarcoma.