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Mucosal (nasal = NL (A) and bronchoalveolar lavages = BAL (B)) and systemic (serum (C)) T helper type 2 (Th2) cytokines production by young mice immunized with different groups of PppA, Lactobacillus casei (Lc) and PppA+Lc vaccines. (see Fig. 2 for details).
