Similarly, MS patients carrying the HLA-DRB1*15 allele (risk allele) (HLA-DRB1*15+) (N = 42/117) had higher EBV viral load (11.7; 2.0–58.3 copies/μg) than those not carrying this allele (HLA-DRB1*15−) (N = 75/117) (2.0; 2.0–21.1 copies/μg) (Fig. 3a) (p = 0.02). The gene discussed is HLA-DRB1; the disease is myeloid sarcoma.