CD4 and common variable immunodeficiency: Our hypotheses concerning the above‐mentioned correlations in IEI+ group and CVID subgroup are strengthened by the fact that, in IEI− group, CD4+ naїve T‐cells% showed an inverse correlation respectively milder with CD4+ effector memory T‐cells% (Pearson's R = −0.545) and not significant with CD21low B‐cells% (Pearson's R = −0.024).