There are, at present, mainly three modes of immunity of a stain witness, transaction immunity, use and derivative use immunity , and informal immunity.

目前，主要存在三种豁免模式：罪行豁免、证据使用豁免和非正式豁免。

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Only one dose of the live vaccine is required to provide long-term immunity but the vaccine that is currently in use may result in spontaneous abortion if given to pregnant animals.

提供长期免疫只需要一剂活疫苗，但目前所使用的疫苗如果用于怀孕动物，则可能造成自然流产。

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The effect of medicament-control, how to use vaccine controlling HCMV infection and related disease, and the role of passive immunity in controlling HCMV infection were introduced in detail.

阐述了使用药物控制HCMV感染的效果，疫苗在控制HCMV感染及引发疾病方面的作用及通过被动免疫控制HCMV感染的现状与进展。

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In such a situation, what the defendant needs, of course, is a grant of at least use-immunity for his witness.

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Politicians regularly use their immunity to block inquiries involving their allies.

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On the other hand, after last week Thompson could use a compelling witness, although, even if the ongoing immunity discussions bear fruit, Huang would be unlikely to appear this month.

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