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


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另一种看法是,油价在过去三年中的变动,是长期结构性变化的开始,预示着下一个50年里,能源价格按实际值计算将显著低于上一个50年。简单地说,持这种看法的人认为,供给的增长潜力超过需求增长。
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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.”

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近日中国警方对南部一家不法食品商家进行突袭,曝光成吨的腐臭鸡爪。这些有几十年历史的“美味”经过“特殊加工”后,会卖给毫不知情的消费者。

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.

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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. 欧普照明合作荷兰公司 加速全球扩张战略 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “Statistics showed that Tibet had around 590,000 rural poor by the end of 2015. 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. “Ask questions immediately if you don't understand something. If you're in the front row and have been making eye contact, your instructor probably already knows by the look on your face that you don't understand something. A polite raising of your hand is all you need to do to indicate you've got a question. USA Today. 9 July 2020.

Marty, Francisco M., et al. 展望:2016卫浴行业流行趋势 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. As a national exam with more than 1 million test takers every year, the National Postgraduates Entrance Examination is very important for students' academic life, and cheating incidents have been exposed from time to time. Associated Press. 7 Jul 2020.

UCDavis Health. 新政之下中介变谨慎 “问题”房源一夜之间下架 Accessed 3 Aug 2020.

University of Queensland, Australia. 以量占领市场 达成家具高销售额 Accessed Aug 3 2020.

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