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Neutralization antibody titer of female mouse seruma
| Group | Mice no. | Neutralization antibody titers (21 days after the 3rd infection) | Offspring survival rate |
|---|---|---|---|
| Naive infection | 4/4 | ND | 21/21 (0%) |
| Protection | 1 | 1:20 | 1/4 (25%) |
| 2 | 1:40 | 4/7 (57.1%) | |
| 3 | 1:20 | 2/5 (40%) | |
| 4 | 1:80 | 5/7 (71.5%) |
ND, not detected.
