Figure 1.
Humoral immune response and protective effect of the G+ CsA vaccine in mice after priming neonates and boosting in infancy. (A) Neonatal mice were immunized at day 0 (5 days after birth) and day 14 then challenged intranasally with RSV at day 28. The mice were sacrificed at day 33. (B) Individual lung tissue RSV load was assessed by qRT-PCR and expressed as % of the load found in the PBS control group (unvaccinated infection control). (C) Serum anti-G IgG antibody titer was tested by ELISA. (D) Serum RSV-neutralizing antibody was tested by plaque assay. Data are mean ± SEM of n = 4–6 mice per group. ND, no detection. *P < .05, **P < .01, ***P < .001, ****P < .0001.