CD4 and systemic lupus erythematosus: In univariate analysis, altered proportions of CD4+ T cells and CD8+ T cells were found between patients with active SLE and those with inactive SLE; the proportions of CD4+ T cells, CD8+ T cells, CD4−CD8− T cells, CD4+CD8+ T cells, Tregs, NK cells, MyDCs, pDCs, basophils and ILCs were altered in patients with active SLE compared with those in healthy controls; and the proportions of Tregs, NK cells, MyDCs, pDCs, basophils and ILCs were altered in patients with inactive SLE compared with those in healthy controls.