一項(xiàng)新的研究顯示,老年人感染新冠病毒痊愈后,,再次感染的風(fēng)險(xiǎn)更大,。
根據(jù)3月17日發(fā)表在《柳葉刀》(Lancet)上的研究結(jié)果,,雖然大多數(shù)人在至少6個(gè)月內(nèi)不太可能再次感染這種疾病,但老年人群再次感染的概率更高,。丹麥去年對(duì)測(cè)試結(jié)果做的一項(xiàng)研究顯示,,那些65歲以下曾經(jīng)感染過(guò)新冠肺炎的人,有大約80%的可能性不會(huì)再次感染,,而對(duì)于65歲及以上的人群,,這個(gè)比例降至47%。
作者稱,,數(shù)據(jù)顯示,,那些感染過(guò)新冠病毒的人仍然應(yīng)該接種疫苗,而不能依賴于自身抵抗力,,對(duì)于老年人來(lái)說(shuō)尤其如此,,因?yàn)樗麄兓加袊?yán)重疾病的風(fēng)險(xiǎn)最大。丹麥的這項(xiàng)分析針對(duì)冠狀病毒的原始毒株,,并沒(méi)有對(duì)被認(rèn)為更易傳播的新變種進(jìn)行評(píng)估,。
位于哥本哈根的國(guó)立血清研究所(Statens Serum Institut)的高級(jí)研究員斯汀·艾斯伯格在一份聲明中說(shuō):“我們的研究結(jié)果清楚地表明,在新冠疫情期間實(shí)施保護(hù)老年人的政策是多么重要,,即便是對(duì)那些已經(jīng)感染過(guò)新冠肺炎的老年人,。我們的發(fā)現(xiàn)還說(shuō)明,政府制定的政策應(yīng)該注重于更廣泛的疫苗接種策略和放寬封鎖限制,?!?/p>
該研究的作者分析了丹麥的國(guó)家新冠病毒檢測(cè)戰(zhàn)略所收集的數(shù)據(jù)。該國(guó)有超過(guò)三分之二的人口(約400萬(wàn)人)在第一期和第二期檢測(cè)中接受了測(cè)試,。分析發(fā)現(xiàn),,在這兩期檢測(cè)中,只有0.65%的人在第一期和第二期的核酸檢測(cè)均呈陽(yáng)性,,而更高比例的人(3.3%)第一期檢測(cè)結(jié)果為陰性,第二期為陽(yáng)性,。
作者稱,,沒(méi)有證據(jù)表明,對(duì)再次感染人群的保護(hù)力在六個(gè)月內(nèi)會(huì)減弱,,這與其它研究結(jié)果是一致的,。然而,由于新冠病毒在2019年12月才被人類發(fā)現(xiàn),,因此感染帶來(lái)的保護(hù)性免疫力的完整時(shí)長(zhǎng)仍然有待確定,。此外,他們寫道,,無(wú)法評(píng)估癥狀的嚴(yán)重程度是否會(huì)影響患者的免疫力程度,。
倫敦帝國(guó)理工學(xué)院(Imperial College London)的羅斯瑪麗·波依頓教授和丹尼爾·阿特曼教授對(duì)這項(xiàng)研究發(fā)表評(píng)論稱:“這些數(shù)據(jù)證實(shí)了,,對(duì)于新冠病毒來(lái)說(shuō),通過(guò)自然感染獲得保護(hù)性免疫力的希望并不像人們想的那么大,,而使用高效力疫苗的全球疫苗接種計(jì)劃才是持久的解決方案,。”(財(cái)富中文網(wǎng))
譯者:Min
一項(xiàng)新的研究顯示,,老年人感染新冠病毒痊愈后,,再次感染的風(fēng)險(xiǎn)更大。
根據(jù)3月17日發(fā)表在《柳葉刀》(Lancet)上的研究結(jié)果,,雖然大多數(shù)人在至少6個(gè)月內(nèi)不太可能再次感染這種疾病,,但老年人群再次感染的概率更高。丹麥去年對(duì)測(cè)試結(jié)果做的一項(xiàng)研究顯示,,那些65歲以下曾經(jīng)感染過(guò)新冠肺炎的人,,有大約80%的可能性不會(huì)再次感染,而對(duì)于65歲及以上的人群,,這個(gè)比例降至47%,。
作者稱,數(shù)據(jù)顯示,,那些感染過(guò)新冠病毒的人仍然應(yīng)該接種疫苗,,而不能依賴于自身抵抗力,對(duì)于老年人來(lái)說(shuō)尤其如此,,因?yàn)樗麄兓加袊?yán)重疾病的風(fēng)險(xiǎn)最大,。丹麥的這項(xiàng)分析針對(duì)冠狀病毒的原始毒株,并沒(méi)有對(duì)被認(rèn)為更易傳播的新變種進(jìn)行評(píng)估,。
位于哥本哈根的國(guó)立血清研究所(Statens Serum Institut)的高級(jí)研究員斯汀·艾斯伯格在一份聲明中說(shuō):“我們的研究結(jié)果清楚地表明,,在新冠疫情期間實(shí)施保護(hù)老年人的政策是多么重要,即便是對(duì)那些已經(jīng)感染過(guò)新冠肺炎的老年人,。我們的發(fā)現(xiàn)還說(shuō)明,,政府制定的政策應(yīng)該注重于更廣泛的疫苗接種策略和放寬封鎖限制?!?/p>
該研究的作者分析了丹麥的國(guó)家新冠病毒檢測(cè)戰(zhàn)略所收集的數(shù)據(jù),。該國(guó)有超過(guò)三分之二的人口(約400萬(wàn)人)在第一期和第二期檢測(cè)中接受了測(cè)試。分析發(fā)現(xiàn),,在這兩期檢測(cè)中,,只有0.65%的人在第一期和第二期的核酸檢測(cè)均呈陽(yáng)性,而更高比例的人(3.3%)第一期檢測(cè)結(jié)果為陰性,,第二期為陽(yáng)性,。
作者稱,沒(méi)有證據(jù)表明,,對(duì)再次感染人群的保護(hù)力在六個(gè)月內(nèi)會(huì)減弱,,這與其它研究結(jié)果是一致的,。然而,由于新冠病毒在2019年12月才被人類發(fā)現(xiàn),,因此感染帶來(lái)的保護(hù)性免疫力的完整時(shí)長(zhǎng)仍然有待確定,。此外,他們寫道,,無(wú)法評(píng)估癥狀的嚴(yán)重程度是否會(huì)影響患者的免疫力程度,。
倫敦帝國(guó)理工學(xué)院(Imperial College London)的羅斯瑪麗·波依頓教授和丹尼爾·阿特曼教授對(duì)這項(xiàng)研究發(fā)表評(píng)論稱:“這些數(shù)據(jù)證實(shí)了,對(duì)于新冠病毒來(lái)說(shuō),,通過(guò)自然感染獲得保護(hù)性免疫力的希望并不像人們想的那么大,,而使用高效力疫苗的全球疫苗接種計(jì)劃才是持久的解決方案?!保ㄘ?cái)富中文網(wǎng))
譯者:Min
Older people are more at risk of catching Covid-19 again after recovering from a previous bout of the virus, new research shows.
While most people are unlikely to get the disease again for at least six months, the elderly are more prone to reinfection, according to the results published on March 17 in the Lancet. The study of test results in Denmark last year showed that those under age 65 who’d had Covid were about 80% protected from getting it again. Protection dropped to 47% for those 65 and older.
The data suggest that those who have had the virus should still be vaccinated, the authors said. Natural protection can’t be relied upon, particularly for the elderly, who are most at risk of severe disease. The Denmark analysis focused on the original coronavirus strain and made no assessment of new variants thought to be more transmissible.
“Our findings make clear how important it is to implement policies to protect the elderly during the pandemic,” even if they have already had Covid-19, Steen Ethelberg, a senior researcher from the Statens Serum Institut in Copenhagen, said in a statement. “Our insights could also inform policies focused on wider vaccination strategies and the easing of lockdown restrictions.”
The authors of the study analyzed data collected as part of Denmark’s national SARS-CoV-2 testing strategy. More than two-thirds of the population, or about 4 million people, were tested over a period spanning the country’s first and second waves. The analysis found that only 0.65% of people returned a positive PCR test during both waves. A higher proportion -- 3.3% -- got a positive result after a previous negative one.
In line with findings from other studies, there was no evidence that protection against reinfection waned within six months, the authors said. However, since the virus was only identified in December 2019, the complete period of protective immunity conferred by infection has still to be determined. It also wasn’t possible to assess whether the severity of symptoms affected a patient’s degree of immunity, they wrote.
“These data are all confirmation, if it were needed, that for SARS-CoV-2 the hope of protective immunity through natural infections might not be within our reach and a global vaccination program with high-efficacy vaccines is the enduring solution,” professors Rosemary Boyton and Daniel Altmann from Imperial College London wrote in a comment linked to the study.