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最新研究警告,新冠快筛并不保险

最新研究警告,新冠快筛并不保险

Erin Prater 2022-11-17
荷兰研究人员发现,快速新冠检测的假阴性率高达约75%。

图片来源:PHOTO BY GETTY IMAGES

今年节日季,如果你打算去探望脆弱的亲人,并在此之前进行了新冠检测,那么就请注意:一项最新研究发现,居家快速检测可能让你产生一种虚假的安全感。

荷兰研究人员安排专业医护人员对数千人进行鼻拭子检测,并向受试者提供了居家快速检测试剂,由他们自己完成检测。他们发现,快速检测试剂的假阴性率约为75%。这一结论来自《临床微生物学和感染》杂志(Clinical Microbiology and Infection)于11月12日发表的一篇研究论文。

研究人员排除病毒载量最低的感染者之后,快速检测的假阴性率依旧超过一半。研究人员写道,快速检测的效果是“足够的”,但只有在检测者出现症状之后。

节日是家庭团聚的好时节,也是新冠、流感和呼吸道合包病毒(RSV)等疾病传播的季节。虽然新变异毒株使新冠到目前为止没有变成一种季节性疾病,但在寒冷天气经常会出现新冠疫情高峰,因为这时候人们往往留在室内和聚会庆祝节日。

从新冠疫情初期以来,公共卫生官员一直呼吁人们在探望老年人或免疫力低下的亲朋好友之前,进行检测和隔离,无论对方是否接种了疫苗。在策划大型聚会之前,同样需要如此。

但研究人员写道,在奥密克戎疫情期间,快速检测“只能检测出少数感染者”。这可能是因为新冠病毒的感染者如果没有症状,其病毒传播水平通常较低,而且没有流鼻涕,而从鼻涕中更容易检测出阳性。

研究人员写道,自我检测“对于希望保护弱势群体的无症状感染者价值有限,甚至会产生一种虚假的安全感”。“人们需要清楚这一点,并且更了解其他预防措施,例如保持距离或佩戴口罩等。”

华盛顿大学医学院(University of Washington School of Medicine)的健康测量与评价中心(Institute of Health Metrics and Evaluation)的研究人员预测,到预测周期截止的1月,新冠确诊病例持续逐步增加。据美国疾病控制与预防中心(U.S. Centers for Disease Control and Prevention)披露,美国每周新冠死亡人数始终在2,500人左右。(财富中文网)

译者:刘进龙

审校:汪皓

今年节日季,如果你打算去探望脆弱的亲人,并在此之前进行了新冠检测,那么就请注意:一项最新研究发现,居家快速检测可能让你产生一种虚假的安全感。

荷兰研究人员安排专业医护人员对数千人进行鼻拭子检测,并向受试者提供了居家快速检测试剂,由他们自己完成检测。他们发现,快速检测试剂的假阴性率约为75%。这一结论来自《临床微生物学和感染》杂志(Clinical Microbiology and Infection)于11月12日发表的一篇研究论文。

研究人员排除病毒载量最低的感染者之后,快速检测的假阴性率依旧超过一半。研究人员写道,快速检测的效果是“足够的”,但只有在检测者出现症状之后。

节日是家庭团聚的好时节,也是新冠、流感和呼吸道合包病毒(RSV)等疾病传播的季节。虽然新变异毒株使新冠到目前为止没有变成一种季节性疾病,但在寒冷天气经常会出现新冠疫情高峰,因为这时候人们往往留在室内和聚会庆祝节日。

从新冠疫情初期以来,公共卫生官员一直呼吁人们在探望老年人或免疫力低下的亲朋好友之前,进行检测和隔离,无论对方是否接种了疫苗。在策划大型聚会之前,同样需要如此。

但研究人员写道,在奥密克戎疫情期间,快速检测“只能检测出少数感染者”。这可能是因为新冠病毒的感染者如果没有症状,其病毒传播水平通常较低,而且没有流鼻涕,而从鼻涕中更容易检测出阳性。

研究人员写道,自我检测“对于希望保护弱势群体的无症状感染者价值有限,甚至会产生一种虚假的安全感”。“人们需要清楚这一点,并且更了解其他预防措施,例如保持距离或佩戴口罩等。”

华盛顿大学医学院(University of Washington School of Medicine)的健康测量与评价中心(Institute of Health Metrics and Evaluation)的研究人员预测,到预测周期截止的1月,新冠确诊病例持续逐步增加。据美国疾病控制与预防中心(U.S. Centers for Disease Control and Prevention)披露,美国每周新冠死亡人数始终在2,500人左右。(财富中文网)

译者:刘进龙

审校:汪皓

If you’re testing for COVID before visiting vulnerable loved ones this holiday season, be warned: At-home rapid tests may give you a false sense of security, according to a new study.

Researchers in the Netherlands had medical professionals swab the noses of thousands of individuals, then sent them home with a rapid test to complete themselves. They found that rapid tests provided false negatives about 75% of the time, according to the study, published Saturday in Clinical Microbiology and Infection.

When researchers eliminated infected individuals with the lowest viral loads, rapid tests still gave false negatives more than half the time. Such tests perform “adequately,” but only after individuals have developed symptoms, researchers wrote.

The holidays are prime time for family get-togethers—and for illnesses like COVID, flu, and RSV to spread. While new variants have prevented COVID from becoming a seasonal illness so far, spikes are common during cold weather, when individuals tend to stay inside and gather for holiday celebrations.

Since early in the pandemic, public health officials have urged those visiting elderly or immunocompromised friends and relatives—both vaccinated and unvaccinated—to test and quarantine ahead of their visit. The same goes for those planning to gather in large groups.

But in the era of Omicron, rapid tests “may only detect the minority of infections,” researchers wrote. This is likely because individuals sick with COVID who don’t have symptoms usually have low levels of the virus circulating—and don’t have a runny nose that would make testing positive much easier.

Self-testing has “limited value for asymptomatic individuals wishing to protect vulnerable persons and may even lead to a false sense of security,” the authors wrote. “One should be aware of this, and better informed about other prevention options such as physical distancing or mask use.”

Researchers at the University of Washington School of Medicine’s Institute of Health Metrics and Evaluation project a continued gradual rise in COVID cases through January, the end of their forecasting period. Weekly U.S. deaths from the virus are hovering at around 2,500, according to the U.S. Centers for Disease Control and Prevention.

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