Sometimes food goes bad, but people don't know it, so they eat it anyway and then they get sick.

有时食物变质了人们却不知道，所以还是食用了它，结果就病了。

《柯林斯英汉双解大词典》

If they get sick or slow down, something stronger kills them.

如果它们生病或是动作慢下来，就立刻会被强大的捕杀者杀死。

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They get sick, infect one another, then bring the disease back home.

他们患病又感染其他人，然后又带病回家。

youdao

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

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

Moreover, new regulations require insurance companies to offer them coverage even after they get sick.

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And if not, what happens if they get sick and they wind up in emergency rooms?

CNN: Part 2 of CNN Democratic presidential debate

Would you want to go back to dropping coverage for people when they get sick?

WHITEHOUSE: Implementing the Affordable Care Act