Many researchers think a T-cell response would limit disease severity but would not stop you falling ill.

许多研究者认为t细胞应答能限制疾病的严重程度，但不能预防疾病。

youdao

He's been ill and isn 't fit for work yet.

他一直在生病，尚不能工作。

youdao

He must be ill, for he isn t here.

他今天没来，看来一定是生病了。

youdao

"At the time these payments were made they were ill advised - bad judgment on the part of these companies, but they didn't violate any statute.

VOA: standard.2010.07.23

It is "you are ill because you don't have enough health in your life, " because you are not pursuing those things that make you healthy".

它说的是,“你生病了，是因为你还不够健康，因为你不去追求那些让你健康的东西。

哈佛公开课 - 幸福课课程节选

The claim, however, is not that I can't picture being ill or dying.

而这种说法，不是说我无法想象自己重病垂死。

耶鲁公开课 - 死亡课程节选

That's why I support comprehensive background checks, so criminals and the dangerously mentally ill can't buy guns.

NPR: US Arms Control Advocates Must Show They Like Guns

That said, most people sitting near someone who is ill probably won't get sick.

WSJ: Where Germs Lurk on Planes

On one flight studied, one passenger spread a particular strain to someone seated seven rows away, while people seated next to the ill passenger didn't contract the disease.

WSJ: Where Germs Lurk on Planes