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Immunization with NL PorB and PorB/VDs induces different cytokine responses. Serum cytokine levels were measured by ELISA and quantified in pg/mL. Values from immune sera of individual mice (week 6) in each group were normalized to the pooled pre-immune sera from the same group and expressed as fold-change ± SEM. (A) IL-10 and (B) IL-12p70. *; **; *** p < 0.05 by unpaired t-test.
