Table 1: Rabbit challenge treatment schedule.

GroupVaccineDose volumeRoute of administrationFrequency of administrationNo. of animals

1Type A blood group500,000 RBC/~1 mLSubcutaneous2 doses, Days 0 and 213
2Type O blood group500,000 RBC/~1 mLSubcutaneous2 doses, Days 0 and 213
3Type A-ECO blood group500,000 RBC/~1 mLSubcutaneous2 doses, Days 0 and 213