Fig. 2. Characterization of humoral immune responses induced by immunization of the recombinant adenoviruses. BALB/c mice were immunized once with 1×108 PFU rAd/mock, rAd/B-NP(V), or rAd/B-NP(I) via intranasal route. Two weeks later, average anti-nucleoprotein (NP) IgG antibody responses in the sera were measured by enzyme-linked immunosorbent assay. a)p<0.001.
