With respect to T cells, we observed that the proportion of infant cord blood CD4+ T cells that expressed the marker of naivety CD45RA or that had the FOXP3+CD25high phenotype, regarded as a marker of regulatory T cells, were positively associated with allergy, in the PCA as well as in the OPLS, although the differences between these variables did not reach statistical significance in the univariate analysis. The gene discussed is FOXP3; the disease is allergic disease.