新研究发现：新冠免疫力“正在消退”

先前的研究显示，新冠抗体在人体内只能存留几个月，而今英国的一项新研究发现，带有新冠病毒抗体的人口比例大幅下降，这可能意味着新冠免疫力正在快速消退。

Researchers in the United Kingdom say they've observed a "significant" decline in the percentage of the population with COVID-19 antibodies, potentially pointing to "waning immunity."

英国的研究人员称，他们观察到拥有新冠病毒抗体的人口比例“大幅”下降，这可能意味着“免疫力在消退”。

Imperial College London scientists in the study found the prevalence of COVID-19 antibodies declined from six percent of the British population in June to 4.4 percent in September, Reuters reports. They came to the conclusion that there has been a "significant decline in the proportion of the population with detectable antibodies" by sending out finger-prick tests to a randomly selected group of over 365,000 people in England, according to cnn.

伦敦大学帝国理工学院的科学家在这项研究中发现，新冠抗体的覆盖率正在下降。据路透社报道，英国带有新冠抗体的人口所占比例从六月份的6%下降到了九月份的4.4%。据美国有线电视新闻网报道，研究人员在给英国随机选择了逾36.5万人，并发放手指采血检测试剂盒，他们检测后得出结论称，“可检测到抗体的人口比例大幅下降”。

"On the balance of evidence I would say, with what we know for other coronaviruses, it would look as if immunity declines away at the same rate as antibodies decline away, and that this is an indication of waning immunity at the population level," Wendy Barclay, head of Imperial College London's Department of Infectious Disease, said, per Reuters.

据路透社报道，伦敦大学帝国理工学院传染病中心主任温迪·巴克莱称：“据我们对其他冠状病毒的了解，证据对比显示，免疫力和抗体水平会同步下降，这表明英国人口的新冠免疫力在消退。”

The researchers were specifically looking for IgG antibodies in the study, and cnn notes that some other research has suggested "that other types of antibodies may persist longer than IgG does."

研究人员在这项研究中寻找的特定抗体是免疫球蛋白G，美国有线电视新闻网指出，其他一些研究显示“其他种类的抗体持续的时间可能比免疫球蛋白G更长”。

But Imperial College London's Helen Ward told BBC News the study suggests that "immunity is waning quite rapidly." Ward added in a statement, "We don't yet know whether this will leave these people at risk of reinfection with the virus that causes COVID-19, but it is essential that everyone continues to follow guidance to reduce the risk to themselves and others."

但是伦敦大学帝国理工学院的海伦·沃德告诉BBC新闻频道说，研究表明“免疫力消退的速度相当快”。沃德在一份声明中还说：“我们还不知道这是否会导致人们陷入重新感染新冠病毒的风险，不过很重要的一点是，大家都要继续遵守疫情防控指导意见，以降低自己和他人的感染风险。”