| Group | Proliferation (CPM 10−3) of splenocytes after stimulation with | ||
| Medium | IPRV | PIKA | |
| IPRV | 0.264 | 0.192 | 0.532 |
| PIKA-IPRV | 3.216 | 2.413 | 3.667 |
| PBS | 0.675 | 0.433 | 2.699 |