CD8A and myeloid sarcoma: The inverse correlation between the anti-EBNA1 IgGtitre and the frequency of LCL-specific CD8+ T cells in MS confirmsour previous finding of an inverse correlation between this titre and the frequencyof LCL-specific T cells, as determined by ELISPOT assays,19 suggesting that the elevated anti-EBNA1 IgG titre reflectsan increased EBV latent antigen load resulting from the defective T-cell control ofEBV.