If in some circumstances someone from a low-risk region is tested positive during a trip, the person can be quickly identified and relevant COVID-19 control measures will be imposed, the CDC expert said.
疾控中心专家说,如果在某些情况下,来自低风险地区的人在旅行中检测呈阳性,可以迅速识别该人,并将实施相关的新冠控制措施。