每年有成千上万例新的病毒病例被诊断出来。

Thousands of new ___cases of the virus are diagnosed annually.

他因一例严重的肺炎而住院治疗。

He was hospitalized due to a severe ___case of pneumonia.

早期检测对于治疗此类癌症病例至关重要。

Early detection is crucial for treating this type of cancer ___case.