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The Logic Behind A 14-Day Quarantine After Travel Or COVID-19 Exposure : Shots - Health News What's behind the "14 days of self-quarantine" guidance after exposure to someone with COVID-19 or after travel from a place with a high number of cases? Think of yourself as a potential incubator.
NPR logo The Science Behind A 14-Day Quarantine After Possible COVID-19 Exposure

The Science Behind A 14-Day Quarantine After Possible COVID-19 Exposure

A sign on the M8 motorway last week in Glasgow, Scotland. Jeff J. Mitchell/Getty Images hide caption

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Jeff J. Mitchell/Getty Images

江西贵溪盘活闲置厂房促发展

Jeff J. Mitchell/Getty Images

To stop the spread of the coronavirus, health officials have a favorite refrain: After being in a city or region where there have been a lot of COVID-19 cases, spend 14 days in quarantine even if you feel perfectly fine — don't leave your house. Coming from New York? 14-day quarantine. Arriving in Hawaii? 14-day quarantine. Been in Italy or China or Iran recently? 14-day quarantine.

"That's a long-standing public health practice, and it's called 'traveler's quarantine,' " explains Lindsay Wiley, a professor at American University's Washington College of Law. "Fourteen days is not a made-up number here — it's based on what we know so far about COVID-19, and it's possible that over time we'll see that number change as we learn more [about the virus]."

The 14-day rule is widespread because public health agencies around the world work together on these guidelines. In the U.S., the 房地产上市公司回购增多 the quarantine period, and its counterpart organizations do so abroad, all in concert with the World Health Organization.

又到了一年盘点的时候了,扬子晚报上传了一段名叫今年中国网络九条最热流行语的视频,盘点了如下几条流行语。
超级大坏蛋们将受命保护人类——这就是《自杀小队》的主旨。 一个名叫“A.R.G.U.S”的政府机构招募了一些罪犯帮它执行危险任务,罪犯们将得到的报酬是减刑。这支特遣小队的成员有小丑、死亡射手、哈利·奎恩、回旋镖队长、杀人鳄以及DC漫画宇宙里的其他坏家伙。

Major areas of work for 2017

Shipments of cellphones made by Chinese companies reached 498 million in 2016, accounting for 88.9% of the country's total shipments, according to the report from the China Academy of Information and Communication Technology.
charitable
"There are always jobs," Challenger says. "Companies are always hiring. But the competition is much tougher."
"He said if he didn't get that package within the next 53 years, he would call to complain," university spokeswoman Christine Kindl told Reuters news agency.
[ai'dentiti]
Between 1991 and 2010, the cancer mortality rate fell by a whopping 20%, which is more than 10% a decade. One day we will say goodbye to cancer for good.
France’s HEC Paris and Essec Business School remained second and third, respectively, for the third year running.
这项技术曾经运用于武器,但是运用在仿生腿上会更复杂。误读信号可能导致安装者跳下桥或站在开动的车辆前,依靠思想控制的仿生腿需要比武器更为复杂的程序。正如研究者指出的那样:如果你使用仿生胳膊,而胳膊动作做错了,可能只是手肘偏移预订位置。而如果仿生腿动作做错了,那可能就是生命安全问题了。

"The incubation period varies from virus to virus and sometimes from host to host," says Rachel Graham, a virologist at the University of North Carolina's Gillings School of Global Public Health.

For the virus that causes COVID-19 — its official name is SARS-CoV-2 — researchers have found that the typical incubation period is about five days. About 97% of the people who get infected and develop symptoms will do so within 11 to 12 days, and about 99% will within 14 days.

Canadian border agents are handing people entering Canada a sheet from the Public Health Agency of Canada that instructs them to self-quarantine for 14 days and monitor themselves for any symptoms that might signal COVID-19. Selena Simmons-Duffin/NPR hide caption

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Selena Simmons-Duffin/NPR

“双创”可以说是应运而生,在全球化、“互联网+”的时代,我们推动“放管服”改革,也促进了“大众创业、万众创新”。
上述消息源还称,苹果将在明年10月发布一款12.9英寸的平板电脑,“目标消费群是北美的教育市场(和)……生产商是广达电脑(Quanta Computer)”。有报道称,三星也在研发尺寸在12至13英寸之间的平板电脑,而现在看来,“这些大尺寸平板电脑将极大地影响超极本需求”几乎是板上钉钉的事了。新款“iPad Max”,搭载整合了键盘和电池的新款外壳之后,实际上就是一台笔记本电脑,很有可能在高中生和大学生之中成为主流产品——这一人群需要比现有iPad和iPad Mini产品更好的内容创造工具。

36岁的阿德里亚娜·利马排在第四位,其收入为1050万美元,初为人母的罗西·亨廷顿-怀特利(950万美元)与25岁的卡莉·克劳斯(900万美元)分别位列榜单的第六位和第七位。
收入最高的十位模特中有九位都在内衣品牌维多利亚的秘密有相应的工作,大码模特阿什莉是唯一的例外。
第三,麦克德莫特可以作为一道保险,以防如果今年夏天安德烈-罗伯森选择自由离开时雷霆无人可用。
Roth, 60, is a professor at Harvard University in Boston. Shapley, 89, is a professor emeritus at University of California Los Angeles.

中国信息通信研究院的报告称,2016年国产手机出货量达4.98亿部,占国内手机总出货量的88.9%。
Tesla:In an effort to blunt criticism about slow refueling times for battery-powered cars, Tesla TSLA -1.54% starts to roll out of a network of battery-swap stations. CEO Elon Musk must hope he can outdo Shai Agassi’s Better Place, which tried to build a whole company around battery-swaps before going bankrupt in 2013.
STONINGTON, CONN.
据高部长称,在“十三五”计划期间,中国在与“一带一路”的国家形成优势互补的跨国产业链、价值链的同时,还将持续大力改善投资环境,充分挖掘市场潜力。
4. We were wrong - the testes are connected to the immune system after all. Researchers have discovered a "very small door" that allows the testes to send one-way signals to the immune system, and it could explain why some men struggle with infertility, and why certain cancer vaccines keep failing.

An illustration created at the U.S. Centers for Disease Control and Prevention conveys a likeness of the coronavirus that's behind the current pandemic. CDC hide caption

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CDC

9. Mila Kunis - $11 million
此外,该报告还指出,雨果博斯、雪佛兰和舒洁则跌出了该榜单。

CDC

中国的电影产出量在全球市场上排行第三,有望到2016年年底突破700部。同期,出售给网络视频网站的电影版权达到了近40亿元人民币(5.6亿美元)。
China's economic performance in the past few years should suffice to put predictions of a hard landing to a full stop. China's economy will continue to enjoy medium-high growth and be upgraded to higher levels

The Atlanta-based group expects sales, adjusted for acquisitions, divestitures and currency fluctuations, to rise 3 per cent, compared with its earlier forecast of between 4 per cent and 5 per cent.
有相当多的学生对英国的签证规定感到失望。“很多人认为该项目是在欧洲就业的一条途径,”一名学员表示,“如果这是他们的目标,那么其中很多人肯定已经失望地离开了。”
由于州政府和市政府试图打击不法的旅馆经营者,明年可能会出台一项规定。而与此同时,房产租赁网站Airbnb将游说政府改变法规。“你会看到,规范这一市场的要求会变得更加迫切。”代表租户的律师塞缪尔·J·希莫尔斯泰因(Samuel J. Himmelstein)说。
Here's a full rundown of the activity—and inactivity—with an eye towards naming this year's trade deadline winners and losers.

31岁的罗西每天的工作就是计算五角大楼在养老、医疗和教育福利方面未来的成本。但他说,这份工作不仅仅是鼓捣电子表格数据。他还要与其它政府部门进行沟通,并就金融模型与同事举行头脑风暴会议。
2012年有哪些品牌通过社交媒体提升了它们的声誉?哪些公司则越来越差了?
休伊·沃表示,每架飞机每天飞行12到16个航段,每个航班晚点都很容易造成当天几个航班的延误。为了解决这个问题,航空公司的系统运行和控制中心会在必要时做出调整。这可能涉及到把备用飞机和临时机组成员排入时间表,确保航班的准时到达。
不会。傻子才会去预测足球比赛的结果。最好是作事后诸葛亮。目前已经举办过20届世界杯。其中,巴西(5次捧杯)和德国(4次捧杯)是决赛常客。主场优势有所帮助,东道国赢得了6次奖杯。但是明年的世界杯将在俄罗斯举行,而这位东道主在参赛队伍中排名垫底。

This raises the risk of heavy rains and flooding, scientists pointed out, because warmer temperatures would lead to more water vapour in the world’s atmosphere.
adj. 笨拙的,尴尬的,(设计)别扭的
But what about the tens of thousands of Irish fans? They're out of control.
7. 举重训练可以帮助提高长期记忆力
budget

9. The 2012 Ig Nobel Anatomy Prize
替代燃料:自从柴油车于上世纪50年代从欧洲进入美国以来,人们对柴油车的热情首次冷却殆尽,取而代之的是马力高得吓人的雪佛兰CamaroZL1(580匹马力),和707匹马力的道奇挑战者SRT地狱火等车型。另外,续航里程更长的燃料电池汽车也开始登上舞台,从电池动力汽车那里抢走了不少风头。
1Switzerland
This is BBC Sherlock, so your Watson isn’t stupid. He's rather smart in his own way and insecure about his sexuality (probably straight).
Islands in China come with many restrictions on their use and just 50 years of ownership.

周五,现代和爱茉莉太平洋的股价出现下跌,在首尔下午晚些时候的交易中分别下跌4.4%和12.5%。
《维多利亚与阿卜杜勒》
4月,著名电视节目主持人毕福剑的一段视频在网上流传。在视频中,他以文革时期的京剧剧目调侃国共内战,并夹杂了他个人对毛泽东和共产党的批评。尽管政府竭力阻止,这则视频仍广为流传,更有评论支持毕福剑的意见并捍卫他的言论自由。
英国国家电网(National Grid)的教育和技能主管托尼?莫洛尼(Tony Moloney)表示,参与该项目是国家电网旨在鼓励学校学生学习STEM科目(科学,技术、工程和数学)以及熟悉本领域工作的总体计划的一部分。

Compared with an average age of 45, 52-year-old Jack Ma is the oldest among the top 10 IT tycoons.
Apart from India, other BRICS nations -- Brazil, Russia, China and South Africa -- cut down their holdings of American government securities.
The memes were shared as part of a private Facebook chat where admitted students in the class of 2021 shared edgy jokes as part of a "just-because-we-got-into-Harvard-doesn't-mean-we-can't-have-fun kind of thing", an admitted student told the Harvard Crimson.
According to the China Auto Dealers Chamber of Commerce, which is helping to organise the dealers, Hyundai’s import-only dealer network has already halved in size since 2014.
?Bond has it all and that's exactly what the most beautiful women demand in the men they date. Women who really enjoy sex prefer "bad boys" -- and there's no doubt 007 qualifies. Feminine women prefer masculine men. And for one night stands women look for physical attractiveness and dominance -- which Bond has in spades.
[sp?n'teini?s]

根据租金指导委员会(Rent Guidelines Board)的数据,在过去20年里,纽约市至少有13.3万个单元因这项规定而变成市价房。政策的支持者表示,如果这一趋势持续下去,租金管制政策会被进一步削弱,从而对市长保留保障房的努力构成阻碍。
The predictions of no further action in an annual Financial Times poll of eurozone analysts came despite Mr Draghi’s attempts to convince markets that the ECB remained primed to act should inflation and growth across the single currency area continue to disappoint.
2. 大卫·维勒莱斯(David Virelles),《姆波克》(Mbókò),ECM。才华横溢的年轻钢琴手大卫·维勒莱斯继续着对非洲-古巴文化与仪式的深入研究,带着有条不紊的酷意与精神上的开放性。罗曼·迪亚兹(Román Díaz)担任打击乐手,这张迷人的组曲有着既古典又现代的深刻内涵。

该机构在2014年的一项调查显示,在完成两年教学的受访者当中,86%表示他们通过自己的工作为改变教育不平等采取了行动,65%表示在工作以外采取了行动。
但事实上,作为一项新技术以及新运动,比特币在2014年表现出了猛烈的势头,而且在新的一年有望征服更多怀疑论者。诸多领域的指标证明了这一点:与比特币相关的初创企业和就业岗位数量大增;接受比特币的机构数量也大大增加;开发人员间的活动也较此前增强。
popul人民+ation→人口
其中一项被提议的改变是:要求租金管制型房屋的租户提供收入证明。
彭博(Bloomberg)的调查分析此前预计1月份中国CPI应上升1.9%。