natural focus infection disease

例句：

1. 1. Thenatural focus infection is a major concern forpublic health officials.
   自然焦点感染是公共卫生官员的主要关注点。
2. 2. The research team identifiedthe natural focus infection as the cause ofthe outbreak.
   研究团队确定了自然焦点感染为疫情的原因。
3. 3. The treatment of this naturalfocus infection requires careful monitoring and adjustment ofantiviral therapy.
   这种自然焦点感染的治疗需要仔细监测和调整抗病毒疗法。