Fig. 2.

Proportion of regulatory T cells (T_regs) in cord blood. (a) Four-colour flow cytometry analysis (intercept of CD4⁺CD25^highCD127^low and CD4⁺CD25^high forkhead box protein 3 (FoxP3⁺) and CD4⁺CD127^lowFoxP3⁺. (b) Two-colour flow cytometry analysis (CD4⁺CD25⁺). H: proportion of T_regs in CD4⁺ lymphocytes in cord blood of children of healthy mothers (mean of 77 tested cord blood samples). A: proportion of T_regs in CD4⁺ lymphocytes in cord blood of children of allergic mothers (mean of 76 tested cord blood samples). *P ≤ 0·05.