如果野鸟是这类寄主，它们将很有可能在随后的迁移行动中携带病毒。
If they are such a reservoir, there is a strong likelihood they will carry the virus with them in subsequent migrations.
当一个孩子患上流感或另一种病毒引起的上呼吸道感染，这种细菌就抓住这个机会移行到中耳并导致继发感染。
When a child catches the flu, or another virus that causes an upper respiratory infection, the bacteria seize the opportunity and migrate to the middle ear, causing a secondary infection.
病毒由鼻移行至脑的径路尚未确定。
The route of virus movement from nose to brain was not determined.
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