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Serum IgG and salivary IgA antibody levels. IgG and IgA antibody levels were measured in serum and saliva from infected mice by ELISA. Time zero represents uninfected mice. The results shown are means ± SEM for three mice. ∗, P < 0.05; ∗∗, P < 0.01 (for values from BALB/c or DBA/2 mice).
