Would you get in an airplane with 250 people you didn't know, coughing and sneezing, when you knew that some of them might carry a disease that could kill you, for which you had no antivirals or vaccine?
试想一下，假如一架飞机上的250名乘客里 有人在感冒咳嗽，你知道他们有可能把病传染给你 并且这个病可以引致死亡，你也找不到药来医这种病 你还敢搭这飞机吗？