由于移植物抗宿主病病情的严重性，临床医生在治疗中，往往缺乏细致诊断，就使用大剂量的类固醇抑制免疫细胞的反应。

Because of the severity of GVHD, clinicians often begin treatment — high doses of steroids to suppress the immune response — in the absence of a concrete diagnosis.

youdao

镜下，移植物抗宿主反应是说明“程序性细胞死亡”或单个细胞坏死(即调亡)过程的最好例子。

Microscopically, graft versus host disease is one of the best examples of a process called "apoptosis" or single cell necrosis.

youdao

宿主的免疫系统可能反应过激并且杀死太多细胞，这可能是这个病毒更具致病力的关键因素。

The host's immune system may be overreacting and killing off too many cells, and that may be a key contributor to what makes this virus more pathogenic.

youdao