Wucherpfennig and Strominger first demonstrated that HLA‐DRB1*15: 01‐restricted myelin reactive T‐cell clones from MS patients could recognise homologous peptides from EBV and other viruses,101 and since then, several further publications have shown similar cross‐reactivity on the T‐cell level. This evidence concerns the gene HLA-DRB1 and myeloid sarcoma.