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Number of animals challenged in each test group based on MDA status before vaccination against and challenge by PI3V or BRSV
| PI3V | BRSV | Total | |
| Vaccinated MDA− | 6 | 5 | 11 |
| Vaccinated MDA+ | 6 | 5 | 11 |
| Control MDA+ | 5 | 5 | 10 |
| Total | 17 | 15 | 32 |
BRSV, bovine respiratory syncytial virus; MDA, maternally derived antibodies; PI3V, parainfluenza type 3 virus.
