A person who has chickenpox can spread the virus even before he or she has any symptoms.

水痘患者在出现任何症状之前都可以传播病毒。

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Chickenpox is a highly contagious childhood infection caused by varicella zoster virus (VZV).

水痘是由水痘-带状疱疹病毒(VZV)引起的儿童期高度传染性疾病。

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Anyone who once had chickenpox is at risk of shingles since the virus may become reactivated years after the initial infection.

由于这种病毒可能会在首次感染后数年内重新复活，故任何曾出过水痘的人都有发生带状疱疹的风险。

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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.

CNN: Is it possible to get shingles after childbirth a second time?

Postherpetic neuralgia (post-her-PET-ic noo-RAL-jah) is a complication of shingles, which is caused by the chickenpox (herpes zoster) virus.

CNN: Postherpetic neuralgia

The idea that ultraviolet (UV) rays can inactivate viruses is not new, but this is the first time that such firm conclusions have been made in connection with the varicella-zoster virus, the herpes virus responsible for chickenpox and shingles.

FORBES: Sun's UV Rays May Prevent Chickenpox