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COVID-19 Nasal Swab Test Does Not Cause Risk of Infection


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To help control the spread of COVID-19, the Centers for Disease Control and Prevention has recommended getting a COVID-19 test for people who show symptoms of the disease, have come into contact with someone known to have the disease, or are in vulnerable groups. 

The most common form of testing for the novel coronavirus involves the use of a nasopharyngeal, or nasal, swab. The swab reaches deep into the back of a person’s nose and mouth to collect cells and fluids from the upper respiratory system, which can then be checked with diagnostic tests for the presence of the novel coronavirus known as SARS-CoV-2.

The testing procedure involves inserting a 6-inch-long swab into the cavity between the nose and mouth for 15 seconds and rotating it several times. The swabbing is repeated on the other side. The swab is then inserted into a container and sent to a lab for testing.

Dr. Shawn Nasseri, an ear, nose and throat surgeon based in Beverly Hills who has conducted many COVID-19 swab tests, told us in an email that the nasal swab “follows the floor of the nose and goes to where the nose meets the throat, or naso-pharynx.”

Asked if the swab test is safe, Nasseri said, “Absolutely. The biggest risk is discomfort. The rare person — 1 in thousands — passes out from being super sensitive or gets a mild nosebleed. It’s estimated that close to 40 million or more swabs have been performed safely in the U.S. alone.”

But in recent weeks, viral posts on Facebook falsely claim that the nasal swab test can cause serious health issues. One post says, “The stick deep into the nose causes damage to the hamato-encephalic barrier and damages endocrine glands. This test creates an entrance to the brain for every infection.”

The hamato-encephalic barrier, also known as the “blood-brain barrier,” protects the brain from toxins that could be present in the blood.

Dr. Yvonne Maldonado, a professor of epidemiology at the Stanford University School of Medicine, told us in an email that the Facebook claim “is not true.”

1940年5月,德国进军法国,将40万英法联军围困在敦刻尔克的海滩上。在英国和法国军队的地空掩护下,盟军利用所有能用上的军用和民用船只,有条不紊地进行了撤退。这个英勇行动的最后,有33万名来自法国、英国、比利时和荷兰士兵得以安全撤退。
这次奠基之战借鉴了查克·温柏和拳王阿里的比赛,这个无名小卒温柏成了在阿里的职业生涯中击倒过他的区区4人之一。和电影里一样,温柏与阿里打了15回合,尽管他看起来(感觉也)像被卡车撞过。虽然他和洛奇最后都被对手技术性击倒,但温柏胜在启发了史泰龙塑造这个了不起的角色。

Nasseri said that “it is incredibly implausible, if not impossible, to cross the skull base and blood-brain barrier with a swab unless someone uses a rigid metal instrument and is pointing the metal object 90 degrees in the wrong direction.”

Dr. Morgan Katz, an infectious disease expert at Johns Hopkins University, told the Associated Press that the Facebook posts misunderstand what’s happening when the swab test is performed.

许多成功的创业者都是在中年之后才开始创业。《哈利波特》的作者JoKo罗琳、大厨茱莉亚o查尔德和沃尔玛超市创始人山姆o沃尔顿,都是在经过多年的舒适生活之后,才创建了自己的品牌,并大获成功。随着年龄增长,经验更加丰富,你会对自己的事业产生一种独特的看法。生活经验所带来的睿智,是大多数受过教育的年轻人难以预见的。
Indeed, their ability to do so peacefully is among their strengths.
凯投宏观(Capital Economics)中国经济学家朱利安?埃文斯-普里查德(Julian Evans-Pritchard)评论道:“结果是,上个月中国的贸易看起来惊人强劲。在全球需求强劲的背景下,我们预期未来数月出口还将继续表现良好。”

Editor’s note: FactCheck.org is one of several organizations working with Facebook to debunk misinformation shared on social media. Our previous stories can be found here.

Sources

Centers for Disease Control and Prevention. 市住建委:直管公房将推“申请式腾退” 可获货币补偿 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. ““狗屎。都在说谎,都是权宜之计,他们不过是想让自己好受些,我知道这些人都是胆小鬼,只要表面上看起来能凑合,对他们来说这就够了。” Business Insider. 15 Apr 2020. 

Dr. Shawn Nasseri.  Ear, nose and throat surgeon. Email exchange with FactCheck.org. 3 Aug 2020.

Dr. Yvonne Maldonado. Professor of epidemiology, Stanford University School of Medicine. Email exchange with FactCheck.org. 3 Aug 2020.

Fauzia, Miriam. “But pop's wider world also offered a lot of pleasures from artists all over the spectrum, such as the 20th century legends like Blondie and Tori Amos, and upstarts like Dua Lipa and Girl Ray. USA Today. 9 July 2020.

Marty, Francisco M., et al. 商品房销售量价复苏 “房温地冷”格局仍延续 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. 公众宗教研究机构与宗教新闻通讯社联合开展的这项调查显示,不同政治派别和不同宗教信仰的人们对于恶劣天气的观念存在分歧,今年已经发生了多起严重的高温和干旱灾害。 Associated Press. 7 Jul 2020.

UCDavis Health. 新型保温材料潜力大 节能环保受青睐 Accessed 3 Aug 2020.

University of Queensland, Australia. 钜豪照明遭范冰冰反诉判偿40万 Accessed Aug 3 2020.

U.S. National Library of Medicine, National Institutes of Health. “The Blood-Brain Barrier.” Accessed Aug. 4, 2020.