HHV 6B virus was present in the saliva and plasma of MS patients, but the presence of EBV and HHV 6 was strongly correlated only in the plasma of MS patients [51], while in a study by Mirzaii-Dizgah et al. [50], significant reductions in MBP levels were obtained in stimulated saliva and serum only. Here, MBP is linked to myeloid sarcoma.