Fig. 3

Induction of Th1/Th2 skewed immune responses post-vaccination. a Shows the serum-IgG1 levels while b shows the serum-IgG2a antibody levels 1 week after final vaccination of animals through i.n. or s.l. routes. Statistical differences were compared by the Student’s t test for unpaired means. *P < 0.05, **P < 0.01, ***P < 0.001, ^nsnot significant. The error bars represent the standard error of mean (SEM)