the other 70 percent could be disabled or permanently disfigured

剩下的百分之七十会成为残疾或永久毁容
as a result of the disease.

这都是天花造成的
It's an infectious disease; it is spread by--through the air.

它是一种传染病通过空气传播
So, it first infects you

所以只要吸入病原体
because you breathe in some of the infectious agent.

你就会被感染
Smallpox is a virus called variola, it's a virus that contains DNA.

天花是病毒引起的这种病毒含DNA
The name of the virus is variola.

病毒的名字叫天花病毒
It's part of a family of viruses,

它是病毒家族的一员
and we'll talk about at least one other member of

我们将会讨论病毒家族的其他成员
that family of viruses as we go through here.

至少要讨论一个
But it can be acquired in the air,

天花会通过空气传播
from patients that are from- from other individuals that are infected.

通过病人和其他感染者呼出的空气传播