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感染奥密克戎后,抗原多久能测出来?——国务院联防联控机制专家回应防疫热点

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新华社北京12月10日电 题:感染奥密克戎后,抗原多久能测出来?——国务院联防联控机制专家回应防疫热点 新华社记者 为进一步优化新冠病毒检测策略,做好防控工作,国务院联防联控机制综合组近日印发了《新冠病毒抗原检测应用方案》等文件。感染奥密克戎后,抗原多久能测出来?抗原“阳”了怎么办?围绕公众关注的热点问题,国务院联防联控机制有关专家作出专业解答。 1.问:感染奥密克戎后,抗原多久能测出来? 答:抗原检测的速度更快,操作更便捷。但一般要等到病毒复制到较高水平、感染者排毒量较高时,抗原才可以检测出来。…

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新华社北京12月10日电 题:感染奥密克戎后,抗原多久能测出来?——国务院联防联控机制专家回应防疫热点 新华社记者 为进一步优化新冠病毒检测策略,做好防控工作,国务院联防联控机制综合组近日印发了《新冠病毒抗原检测应用方案》等文件。感染奥密克戎后,抗原多久能测出来?抗原“阳”了怎么办?围绕公众关注的热点问题,国务院联防联控机制有关专家作出专业解答。 1.问:感染奥密克戎后,抗原多久能测出来? 答:抗原检测的速度更快,操作更便捷。但一般要等到病毒复制到较高水平、感染者排毒量较高时,抗原才可以检测出来。 在初期,即使感染者出现一些轻微症状,由于病毒载量低,抗原检测未必显示阳性。根据奥密克戎的潜伏期估算,一般感染后2至3天可以检测出来。部分感染者尤其是无症状感染者,由于病毒载量持续较低等原因,可能要5天甚至更长时间后才能检测出来。 2.问:抗原检测显示阴性,是不是就意味着没感染? 答:如果病毒在体内还没有大量复制、排出,不能达到抗原检测的灵敏度,结果就会显示阴性。所以会有部分人已经被感染了,甚至出现一些轻微症状,但抗原检测仍显示阴性。不过,通常此时的病毒载量较低,传染性较弱。 抗原检测无需“一天两检”“一天三检”。如有必要,一天测一次即可。 3.问:为什么有人抗原阳性,核酸却是阴性? 答:两种检测方式的灵敏度不同,加上采样操作不一定标准,可能出现“假阳性”或“假阴性”的结果。通常来说,核酸检测的准确率更高。 如居家治疗人员症状明显好转或无明显症状,自测抗原阴性并且连续两次核酸检测阴性(Ct值≥35,两次检测间隔大于24小时),可结束居家治疗,恢复正常生活和外出。 4.问:抗原检测阳性怎么办? 答:抗原检测如果是阳性,没有症状或症状轻微时,居家隔离治疗,按照居家隔离治疗人员用药指引,选择适宜的药物进行治疗。症状加重时,及时前往医疗卫生机构发热门诊(诊室)就诊。…

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