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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.”

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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.

Lady Gaga, who started her own non-profit, the Born This Way Foundation, followed at fourth.
保险代理人员也增加了93.62万人,总人数逾560万人。
The mother-to-child transmission rate also reached its historically low point last year, dropping from 7.1 percent in 2012 to 4.9 percent in 2017, Wang said.

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. 地板“倒闭潮”言过其实 决策正确是破局关键 Accessed Aug 3 2020.

Brueck, Hilary and Samantha Lee. “中国官方PMI指数从10月份的50.8跌至11月份的50.3,这是3月份以来的最低读数。高于50的读数表示相关产业处于扩张之中。 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. “6. Charlize Theron - $16.5 million USA Today. 9 July 2020.

Marty, Francisco M., et al. 北京与廊坊北三县举行项目洽谈会 意向投资额达337亿元 New England Journal of Medicine. 28 May 2020.

Swenson, Ali. It is the first biography to win the prize, although Mr Greenspan’s autobiography, The Age of Turbulence, was shortlisted in 2007, the year before the financial crisis raised serious questions about the central banker’s legacy. Associated Press. 7 Jul 2020.

UCDavis Health. 新一轮个税改革启动 房贷利息拟抵扣个税 Accessed 3 Aug 2020.

University of Queensland, Australia. 楼市二元分化格局或加剧 各地成交冷热不均 Accessed Aug 3 2020.

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