Even then, employees may catch the virus from each other.

便如此，员工之间也可能相互传染病毒。

Assumption One: when susceptible and infectious people interact, it can cause susceptible people to become infected.

当易感人群和传染人群相互作用，会致易感人群被感染。

Packed into squalid cabins, smallpox, typhoid and tuberculosis broke out among them. Accustomed to the care of their mistresses when they were ill in slave days, they did not know how to nurse themselves or their sick.

他们拥挤在肮脏的小木屋里，相互传染着天花、伤寒和肺玻在奴代，他们习惯于生病受到女主人的照顾，可现在他们根本不知道如何看护自己和其他的病人了。