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| Virus | Calculated neutralization titer of chimpanzee IgG against 75 TCID50 of virus* |
|---|---|
| SHIVDH12 (inoculum) | 1:210 |
| Virus isolated from PT99P027 | 1:150 |
| Virus isolated from PT99P024 | 1:110 |
| Virus isolated from PT99P038 | 1:150 |
End-point virus neutralization assays were performed by using IgG from chimpanzee 4750 at a starting concentration of 19.4 mg/ml
