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本发明涉及牛支原体的新的减毒株。
The present invention relates to new attenuated M. bovis bacteria strains.
结论麻疹病毒的减毒株与强毒株存在差异。
Conclusion The attenuated measles virus strain is different from strong virus strain.
乙脑病毒减毒株注入脑内后，病毒繁殖受抑并被清除；
The immune response of attenuated JE vaccine virus strain was reported.
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