They're concerned about his family's potential exposure to COVID-19.

而是因为他们担心家人可能会接触到冠状病毒。

It says travel to Seoul is prohibited except for official duties or for individuals who live or work in the capital city owing to the associated risk of potential exposure to the virus.

该部门表示，因为有可能接触到病毒的相关风险，除执行公务或在首尔生活或工作的个人外，禁止前往首尔。

The V.A. and the Pentagon have recently collaborated on what officials say is a groundbreaking new data-gathering app (the Individual Longitudinal Exposure Record) that will create a detailed portrait of every service member, including deployments, potential exposures and symptoms.

退伍军人协会和五角大楼最近合作，官员们说这是一个开创性的新数据收集应用程序（个人纵向接触记录），它将为每个军人建立详细的肖像，包括部署、潜在接触和症状。