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


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1.You Aren't Learning Anything New
一封投递给美国某位大学生的、来自于其曾经的未婚妻的情书现在终于上路了,虽然这封情书写于1958年,整整迟了53年。

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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.”

“Even though I’m an engineer and an analytical person at heart, the most important decisions I’ve ever made had nothing to do with any of that,” he told an interviewer at Duke University, where he studied for an MBA, last year. “They were always based on intuition.”
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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.

如果说2017年是政策制定者们开始担心“无保障无产阶级”(precariat)人数增长的一年,那么2018年将是他们尝试为此做些什么的一年。
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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. 房地产冰火两重天 警惕要去库存也要防“泡沫” Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “The total amount of remittances, which is estimated to reach $450 billion in 2017, has risen by more than 50 percent in the past decade, IFAD said. 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. “Song “The Spring Blossom” (Na Ying) USA Today. 9 July 2020.

Marty, Francisco M., et al. 发改委就业司召开稳就业工作部门座谈会 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. 4月8日 Associated Press. 7 Jul 2020.

UCDavis Health. 从一季度经济数据看 中国经济已具备足够的发展韧性 Accessed 3 Aug 2020.

University of Queensland, Australia. 2015家居业十大热词大盘点 Accessed Aug 3 2020.

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