Less common causes include mumps virus, varicella zoster virus, and lymphocytic choriomeningitis virus.

不太常见的病因包括腮腺炎病毒、水痘带状疱疹病毒和淋巴细胞脉络丛脑膜炎病毒。

Mumps is an infection that's caused by the mumps virus, even if somebody is not sick at all.

腮腺炎是由腮腺炎病毒引起的感染，即使有人根本没有生病。

The mumps virus is spreading so fast at Harvard University that officials are saying it could affect the school's commencement ceremony onMay 26th.

流行性腮腺炎病毒在哈佛大学的传播速度如此之快，以至于官员们表示这可能会影响该校 5 月 26 日的毕业典礼。