infection complex

例句：

1. 1. The patienthad a complicated infection that required immediate treatment.
   患者有复杂的感染，需要立即治疗。
2. 2.The research team identified several infectious agents that could cause the disease.
   研究团队识别出几种可能引起该疾病的传染性病原体。
3. 3.The hospital has developed an effective vaccine to combat this infectious complex.
   医院已开发了一种有效的疫苗来对抗这种感染复杂。