illness finds its way in by the mouth

例句：

1. 1.He has been suffering from a cold for the past week.
   他过去一周一直感冒。
2. 2. The doctor diagnosed her with an illness that requires treatment.
   医生诊断她患有一种需要治疗的疾病。
3. 3. Illnesses can be prevented by maintaining good hygiene and following proper health practices.
   通过保持良好的卫生习惯和遵循适当的健康实践，可以预防疾病。