immunological reaction

例句：

1. 1. The immune system is responsible for protecting the body against foreign invaders.
   免疫系统负责保护身体免受外来入侵者的伤害。
2. 2.Infections can trigger an immune reaction in the body.
   感染可以引发身体中的免疫反应。
3. 3. The patient's immune system was compromised due to the illness.
   由于疾病，患者的免疫系统受到了损害。