immunoenhancement

例句：

1. 1. The vaccine is an immunoenhancement that can help protect against the virus.
   疫苗是一种免疫增强剂，可以帮助预防病毒。
2. 2. Researchers are studying the effects of immunoenhancement on human health.
   研究人员正在研究免疫增强剂对人类健康的影响。
3. 3. The use of immunoenhancement in cancer treatment has been controversial.
   在癌症治疗中使用免疫增强剂一直存在争议。