He could contract a disease, or die of intoxication.

他可能会感染疾病，或者死于中毒。

Then, if someone contracts a disease, it can spread more easily from person to person.

如果有人感染了疾病，它可以更容易地在人与人之间传播。

" To contract a disease" is to get a disease.

“染病”就是得病。

So, put another way, incidence tells you how likely you are to contract a disease.

因此，换句话说，发病率告诉您您感染某种疾病的可能性有多大。

Elizabeth wanted to become a surgeon, but unfortunately, when she was working at a hospital in Paris, she contracted a disease in one of her eyes that left her blind in that eye.

伊丽莎白想成为一名外科医生， 但不幸的是，当她在巴黎的一家医院工作时，她的一只眼睛染上了一种疾病， 导致那只眼睛失明。