double infection

例句：

1. 1. The patient was diagnosedwith double infection after the surgery.
   手术后，这名患者被诊断出双重感染。
2. 2. Theresearcher found that the virus could causedouble infection in humans.
   研究人员发现这种病毒可以在人类中引起双重感染。
3. 3. The doctoradvised the patient to avoid double infection bywashing their hands frequently.
   医生建议病人通过频繁洗手来避免双重感染。