应美国伊利诺斯州立大学兽医学院的邀请，该专家组对当前PRRS免疫防治的知识现状进行了讨论。
The group discussed the state of current knowledge about PRRS vaccinations at the invitation of the University Of Illinois College Of Veterinary medicine.
应美国伊利诺斯州立大学兽医学院的邀请，该专家组对当前PRRS免疫防治的知识现状进行了讨论。
The group discussed the state of current knowledge about PRRS vaccinations at the invitation of the University Of Illinois College Of Veterinary medicine.
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