An interaction between EBNA positivity and HLA‐A02 has been reported.34, 35 In a recent study of MS cases and non‐MS controls who were seropositive for EBV, EBV viral load was lowest in HLA‐A*A02‐positive individuals, and highest in HLA‐B*07‐positive individuals. The gene discussed is HLA-B; the disease is myeloid sarcoma.