sufferer可数吗

例句：

The sufferer may have to make major changes in his or her life to arrest the disease

患者可能必须对生活习惯作出重大调整以控制病情。

She received many letters of support from fellow sufferers.

许多和她有共同遭遇的'人给她来信，对她表示支持。

Frequently sufferers of this kind of allergy are also sufferers of asthma.

患有这种过敏症的人也经常会患有哮喘病。

I felt more than ordinary human sympathy for him in his misfortune. I was deeply moved as a fellow sufferer.

我对他的遭遇，不只是普普通通的同情，还有一种深切的同病相怜的感触。