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


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该研究的公布正值美国政界反中国言论日益增加之际,此外,今年夏天3起针对从中国进口的钢铁产品的政治敏感反倾销案件即将作出裁决,可能导致美方对中国企业施加高达500%的惩罚性关税。
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2018年,中国电影票房收入增长9%,达到89亿美元(约合609.8亿人民币)。

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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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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. 天津精装房大势所趋 个性化定制引领市场 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “以下是搜索引擎百度公布的在2015年里最受网友关注的十大新闻事件: 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 Harvard article suggests that protecting the brain with a heart-healthy diet could be the key to warding off dementia and keeping your memory intact well into your golden years. Some studies have suggested certain foods have a positive impact on memory, but no study thus far has revealed the existence of a miracle food. The idea that a heart-healthy diet could also prove beneficial to the brain and memory has become popular with doctors studying Alzheimer's disease and dementia. Some of the risk factors associated with heart disease are similar to those associated with dementia and Alzheimer's. Foods recommended for a heart-healthy diet include fruits, vegetables, and whole-grain bread, as well as beans, nuts, and olive oil. If you can't use every one of these 10 scientific secrets to a perfect memory, a healthy diet might help you avoid losing it! USA Today. 9 July 2020.

Marty, Francisco M., et al. 天津建设用地 节约集约利用水平居全国前列 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. 年度最佳单曲:米兰达·兰伯特《Over You》 Associated Press. 7 Jul 2020.

UCDavis Health. 2015年涂料行业失信企业名单公布 Accessed 3 Aug 2020.

University of Queensland, Australia. 儿童家具频上质量黑榜:国标被无视 存在安全隐患 Accessed Aug 3 2020.

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