It is not that catching cytomegalovirus automatically causes a brain tumour-the virus is found, inactive, in about 80% of the population.

这并不是说感染了巨细胞病毒会自动引起脑肿瘤。这种存在于百分之八十人群中的病毒呈休眠状态。

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For some people, the virus remains inactive.

对某些人，病毒将保持不活跃。

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The virus quickly becomes inactive when it is outside of its host (the body).

病毒在离开寄主（身体）之后很快就失活了。

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The chickenpox virus (called varicella zoster virus) remains inactive within the nervous system but may show up as shingles in about 20 percent of people.

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Lentiviruses are notorious for causing long-lasting illnesses that onset after long incubation periods when the virus lies seemingly dormant and inactive.

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