Figure 8: Sera from all immunized mice harvested at day 49 were used to determine the RSV neutralization titer as described in Section 2. Results are presented as an average of data from three groups in triplicate; error bars represent standard deviation. * Significantly different (P < 0.05) from PBS group; **, significantly different (P < 0.05) from PBS and DNA groups. P values were calculated by the Studentís t-test.