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Protective efficacy of the vaccine viruses against RSV A2 strain. (A) RSV A2 virus titers in lungs as determined by plaque assay in Hep2 cells. (B) Body weight loss following RSV challenge. (C) IFNγ concentration in the lungs and BAL of immunized mice post-RSV challenge. (*) indicates a significant difference between indicated groups (p<0.05, Mann-Whitney U test).
