CD4 and myeloid sarcoma: Therefore, for other samples, namely isolated CD4+ T cells from cord blood and from peripheral blood of MS patients reconstituting their naive T cell compartment and MS patients in whom naive T cells had undergone over a decade of homeostatic division, we correlated IL-8 production in naive CD4+ T cells with the frequency of CR2+ cells within the same naive T cell subset prior to activation (Figure 4D).