发现你每天都见的人携带着可能致命的病毒让人不安。
It is very unnerving to find out that someone you see every day is carrying a potentially deadly virus.
事实上在20世纪70年代，就出现了一种可能有如此致命的病毒。
In fact, a virus emerged in the 1970s that could've been just that fatal.
显然对有些人而言即便是致命的病毒也不可能杀死他们的旅行。
Apparently not even a deadly virus can kill the travel bug in some folks.
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