immune function

例句：

1. 1. The vaccine is designed toboost the body's immune function.
   这种疫苗旨在增强身体的免疫功能。
2. 2. The immunefunction of the human body is complex andvaries from person to person.
   人体的免疫功能复杂且因人而异。
3. 3. A weakened immune functioncan lead to a higher risk of infection.
   免疫力减弱可能导致感染风险增加。