Figure 7
The neutralizing antibody changes after virus challenge. After all the immunizations being completed, mice were intranasally challenged with 106 pfu RSV long strain preparations and the neutralizing antibody in serum was determined on day 3, 5, 7, 10, 21 post challenge. Trends of neutralizing antibody level after RSV challenge in mice pre-immunized with FI-RSV, rLong or rLong-∆G-EGFP was shown. Groups at each time point consisted of 4 animals.