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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.”

n. 路线,(固定)线路,途径
当小李子上台领取奖杯时,制片人哈维·韦恩斯坦兴奋地拍拍他的背,全场观众起立为他喝彩。

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. 今年央企去产能从煤钢扩围至有色、船舶、建材、电力 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “2016年上半年,《实验心理学》期刊刊登了一项研究,题为“绘画效应:帮你在无障碍回忆的过程中构筑可靠强大的记忆力”。虽然这篇文章的题目看起来有点长、有点复杂,但是它证明的观点其实很简单,即把单词画出来的记忆方式能够建立更为优质牢固的记忆。研究的主持人进行了一个简单任务实验,在实验中,一位参与者要求画出简单的单词,比如常见的水果,接着,他被要求回忆自己画的是些什么单词。另一些参与者被要求重复朗读给出的单词。 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 economists generally expect the momentum of the recent past to resume and continue once storm distortions abate. The 45 economists who responded to The Wall Street Journal's latest monthly forecasting survey saw the jobless rate falling to 7.8% by next June and 7.5% by the end of 2013. Some say job growth could accelerate from its slow pace. 'I think businesses are going to have to hire,' said Bob Baur, an economist with Principal Global Investors.[qh] USA Today. 9 July 2020.

Marty, Francisco M., et al. 家纺三巨头摩擦频繁 行业竞争白热化 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. Define yourself Associated Press. 7 Jul 2020.

UCDavis Health. 隆达:LED灯泡价格战或一波接一波 未来市场成长可期 Accessed 3 Aug 2020.

University of Queensland, Australia. 家纺行业挤泡沫 企业扩张放缓 Accessed Aug 3 2020.

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