Infection with WNV is either asymptomatic (no symptoms) in around 80% of infected people, or can lead to West Nile fever or severe West Nile disease.

西尼罗河病毒感染可以为无症状感染(没有症状)，约占受感染人群的80%，也可能导致西尼罗热或严重的西尼罗河疾病。

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Both symptomatic and asymptomatic infections can lead to the development of serious complications, as outline above.

如上所述，无论是有症状感染还是无症状感染，都会导致严重并发症。

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Both symptomatic and asymptomatic infections can lead to the development of serious complications, discussed below.

无论是有症状感染还是无症状感染，都会导致严重并发症，讨论如下。

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Routine exercise echocardiography in asymptomatic patients after revascularization does not lead to better outcomes, according to a new study published in Archives of Internal Medicine.

FORBES: No Benefit Found For Exercise Echocardiography In Asymptomatic Patients Following CABG Or PCI