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The safety of recombinant MDV (rMDV).
| Group | Virus | Inoculation Age (Days) | Chicken Number | Inoculation Dose (PFU) | Inoculation Route | Repeat Inoculation Age | |
|---|---|---|---|---|---|---|---|
| Experiment group | 1 | rMDV | 1 | 20 | 3000 | Subcutaneous | 15 |
| 2 | rMDV | 1 | 40 | 30,000 | Subcutaneous | / | |
| 3 | Rispens | 1 | 20 | 3000 | Subcutaneous | 15 | |
| Control | 4 | Phosphate-buffered saline (PBS) | 1 | 20 | / | / | / |
