If they become infected, especially after the first three months of pregnancy, they can get very sick or even die.

VOA: special.2009.08.05

A lot of didn't get sick from it now, and we got sick from it before.

许多人不会再因为微生物得病了,而人们以前则会因此生病

耶鲁公开课 - 生物医学工程探索课程节选

Now, the problem, or one of the challenges with clinical trials of vaccines is that you have to enroll a lot of patients into clinical trials because only a few are going to get sick in any case, only 20 out of 100,000.

现在的问题是,这也是疫苗临床试验的挑战之一,临床试验必须包括足够多的病人,毕竟只有一小部分人会被传染,十万人里面只有二十人被传染

耶鲁公开课 - 生物医学工程探索课程节选

If they become infected,especially after the first three months of pregnancy, they can get very sick or even die.

VOA: special.2009.08.18

"They're fine all day at school, they come home, they get a drink of water, and that's when they got sick.

VOA: standard.2010.01.02

Many people can live with the virus and never get sick, but 25 percent of those infected eventually develop severe liver damage or cancer.

VOA: standard.2010.07.26

Ultra-Orthodox Jews held counter-demonstrations, carrying signs that read: "Sick perverts,get out of Jerusalem."

VOA: standard.2010.07.29