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. 2022 Jul 27;14(8):1651. doi: 10.3390/v14081651

Figure 3.

Figure 3

Survival curves of the MD-vaccinated and unvaccinated birds challenged with viruses HNLH302 or Md5 over the 91-day experimental time period. For each of two experimental groups, 1-day-old birds were separately vaccinated with CEFs containing 2000 PFU of HVT or CVI988 viruses by subcutaneous injection, while for the positive controls, two groups of birds were vaccinated with an equal volume of mock-infected CEFs. At 7 days of age, each of MD-vaccinated or mock control groups were separately challenged by HNLH302 or Md5 viruses (1000 PFU per bird) by intra-abdominal inoculation. Early deaths due to intra-abdominal infection adverse effects and birds sacrificed for body weighting and immune organ collections were excluded for data calculation.