He gets ill.

他病了。

youdao

He is a sturdy boy. He hardly ever gets ill.

这孩子皮实，轻易不闹病。

《新英汉大辞典》

Alf's son is allergic to peanuts and gets ill if he eats any of his friend's peanuts, and Beth's daughter is allergic to cheese and gets ill if she eats any of her friend's cheese sticks.

Alf的儿子对花生过敏，而Beth的女儿对奶酪过敏，他们只要吃了朋友的花生或者奶酪就会生病。

youdao

But when he finally gets ill and comes up to the fact of his mortality, that his body is going to sicken and eventually die, the fact of his mortality seems to shock him, seems to surprise him.

但他最终病倒，和死亡面对面，身体每况愈下，最终死亡，这个事实让他震惊不已，他非常惊讶。

耶鲁公开课 - 死亡课程节选