冠状病毒会两次感染吗?新的研究表明这是可能的
这份初步报告提供了研究人员所说的世界上第一个有记录的再次感染病例。
关于新型冠状病毒，我们都有一百万个问题。至于你是否会两次感染COVID-19，或者你是否会对它免疫，并没有明确的答案。但是有新的证据。
最强的迹象表明它可能是来自香港。临床传染病根据该报告，记录了一名33岁男子的第二次感染病例，这名男子在最初诊断四个多月后再次被感染纽约时报．根据当地的协议，这名男子在3月份住院，尽管他只有轻微的症状，他在两次检测呈阴性后被释放。
然后，在8月15日，他再次测试阳性，虽然他没有症状。这次他是在香港赤喇角机场经过英国西班牙旅行后，次研究人员说，这是世界上第一个记录在案的再感染病例。
这意味着什么呢?据信，这名男子感染了一种病毒，这种病毒于7月和8月在欧洲传播，与他最初感染的病毒不同。研究人员表示，这证明他第二次感染了这种病毒。
费城儿童医院疫苗教育中心主任、儿科教授保罗·奥菲特(Paul Offit)医学博士没有参与这项研究有线电视新闻网这是一个“好消息”，这名男子在第二次发作后没有任何症状。这表明，他的身体产生了抗体反应，这预示着未来将有一个好消息新冠病毒-19疫苗．奥菲特博士告诉有线新闻机构说:“他的第一次感染引发了免疫反应，从而保护了人们免受疾病的侵袭，这对疫苗来说是令人鼓舞的。”
其他专家则不那么肯定。正如哥伦比亚大学病毒学家安吉拉·拉斯穆森所说科学“我不同意这对疫苗和免疫系统有巨大的影响，”因为研究中的病人可能是一个罕见的例子，有人没有对第一次感染产生良好的免疫反应。
人们是否能感染冠状病毒、康复并再次感染的问题自那时以来越来越多报道今年3月，中国有两名检测结果为阴性的患者从医院出院后不得不重新入院，因为他们后来检测结果为阳性。加州生命科学咨询公司的负责人马哈茂德·洛格曼·阿达姆博士说：“在中国患者的案例中，患者没有任何症状，并且表现出改善的迹象。”Innopiphany，告诉健康报告之后，另一名来自日本的患者据报道也出现了症状和症状检测呈阳性在被解除警报后，他第二次接受了COVID-19的治疗。但这些报告的再感染缺乏明确的文件。
人们担心两次得重病，需要反复住院和/或隔离，这是可以理解的。虽然专家们仍在了解新冠病毒-19的行为，但他们对类似的病毒性疾病有更深入的了解。Loghman Adham博士解释说：“一般来说，患者对病毒产生抗体，并对来自同一病毒的重复感染产生免疫力。”。
目前对冠状病毒的检测大多基于聚合酶链反应(PCR)扩增，它测量病毒产生的RNA(核糖核酸，存在于所有活细胞中的一种核酸)的拷贝数。
洛曼-阿德姆博士说:“这项测试只能证实病毒RNA大量存在，但这种RNA可能是病毒RNA的一小部分，因此不会导致感染。”“因此，检测将是‘假阳性’，特别是在病毒复制数低于某个阈值的情况下。”
从鼻子、喉咙、粪便和血液等身体多个部位采集样本，将增加检测到病毒RNA的机会。但这只是为了研究目的。
为了知道样本是否含有传染性病毒，将它们放入装有特殊细胞的皮氏培养皿中，让这些细胞生长和繁殖。如果样本中存在传染性病毒，细胞就会被感染并死亡，”洛曼-阿德姆博士解释道。“这种测试既繁琐又耗时，还可能使技术人员接触到危险的病毒。”
另一项检测是寻找导致COVID-19的SARS-CoV-2病毒的蛋白质或“抗原”。到目前为止，美国食品和药物管理局(fda)已批准紧急使用三种此类检测方法。最新的，由伦敦开发卢米拉克斯根据该公司上周发布的一份声明，该公司在12分钟内就能公布业绩。FDA此前曾批准圣地亚哥Quidel公司和新泽西州Franklin Lakes BD (Becton Dickinson)的抗原测试紧急使用许可。
虽然香港的病例表明重复感染是可能的，但是在科学家们肯定知道之前需要进行更多的研究。“迄今为止已经报道了超过2400万例病例，我们需要在人口水平上观察这种情况。世界卫生组织新冠病毒-19的技术负责人Maria Van Kerkhove在周一的新闻发布会上说。
截至记者发稿时，这篇报道中的信息是准确的。然而，随着围绕新冠病毒-19的情况继续发展，一些数据自发表以来可能发生了变化。虽然卫生部正在努力使我们的报道尽可能保持最新，但我们也鼓励读者通过使用疾病预防控制中心，谁以及当地的公共卫生部门作为资源。
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" } ], "description": "News about the novel coronavirus is breaking nearly 24-7, which makes it challenging at best to keep up with the latest scientific evidence, especially when you're bombarded by false or misleading claims on social media. So how much do you really know about COVID-19? Take our quiz to gauge how knowledgeable you are.
", "gate": "none", "intro_page": true, "uuid": "c5d20a0c-6b54-4691-ac5b-7362b5c9e58c", "brand": "health", "headline": "Quiz: How Much Do You Know About Coronavirus?", "results": [ { "result_starting_range": 0, "button": { "_type": "button", "title": "Start Learning More", "src": "https://x.specialoffers.meredith.com/ats/show.aspx?cr=588&fm=201®source=20571" }, "result_ending_range": 3, "result_description": "Time to bone up on the basic facts about COVID-19. Check out our COVID-19 condition center and subscribe to our daily Healthy Living newsletter and never miss an update.
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