graft versus host reaction

例句：

1. 1. The immune system's ability to recognize and respond to foreign cells is crucial in the graft versus host reaction.
   免疫系统识别并响应外来细胞的能力在移植与宿主反应中至关重要。
2. 2. During the graft versus host reaction, the body mounts an immune response against the grafted tissue.
   在移植与宿主反应期间，身体对移植组织发起免疫反应。
3. 3. The patient's immune system was compromised due to a previous infection, which could have negatively impacted the graft versus host reaction.
   由于之前的感染，患者的免疫系统受到了损害，这可能会对移植与宿主反应产生负面影响。