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


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巴西政府动用数十亿资金建立新球场或扩建现有球场已触发众怒,并导致票价飞涨,这是路人皆知的事情。对此,一些球迷抱怨,曾经负担得起的现场体验变得更加昂贵,想要去诸如马拉卡纳等传奇球馆的热情也变淡了。
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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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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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彭希哲解释称,中部和西部城市化的推进,也吸引了东部沿海城市向内陆地区的大量劳动力前往花销更低的内陆地区。

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. 从全国两会热点话题看新时代新变化 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “在全球前50名女富豪中,中国大陆的女企业家占56%。 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. “The piece was taken away for laboratory testing, and the Spielman family only received a phone call this month telling them the amulet had been identified. USA Today. 9 July 2020.

Marty, Francisco M., et al. 一线城市房价连续15个月回落 坚持房地产调控目标不动摇 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. 11月,财新-Markit制造业采购经理人指数(PMI)从10月的51%降至50.8%,接近区分扩张和收缩的50%大关。此前,路透社(Reuters)对经济学家进行调查得出的预测中值曾预计,制造业PMI将降至50.9%。 Associated Press. 7 Jul 2020.

UCDavis Health. 百城价格指数继续上涨 楼市回暖态势有望延续 Accessed 3 Aug 2020.

University of Queensland, Australia. 反腐刺破高档酒店泡沫:畸形需求伪繁荣难长久 Accessed Aug 3 2020.

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