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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

新品牌抢滩 拉萨建材市场格局出现变化

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 我国城乡低保标准再提高 the quarantine period, and its counterpart organizations do so abroad, all in concert with the World Health Organization.

她最近成了她的父亲、前总理纳瓦兹·谢里夫(Nawaz Sharif)的左膀右臂。但腐败指控给她的迅速崛起蒙上了阴影。
摩洛克位于非洲北部地区,被称为通往非洲的一扇大门,主要旅游城市包括首都拉巴特、最大城市卡萨布兰卡、马拉喀什以及阿加迪尔市。

学员平均年龄:36岁

Bedrooms are up a curving staircase. A loft-like library overlooks the central atrium. Walls of glass in the master suite and its en-suite bathroom take in acres of marshland. The suite opens to a sun deck on the water side of the house. Both other bedrooms also have en-suite bathrooms. The lower level is finished as a gym, with a half bath and a garage with space for several cars.
Among French schools, Toulouse Business School made the best progress, up 14 places, after featuring in the Executive MBA ranking for the first time.
Whether of left or right, they present themselves as representatives of the common people against elites and unworthy outsiders; make a visceral connection with followers as charismatic leaders; manipulate that connection for their own advancement, frequently by lying egregiously; and threaten established rules of conduct and constraining institutions as enemies of the popular will that they embody.
Whatever one's view, two further points for and against Russia's global standing are undeniable:
"没人能阻止行动,我会用生命为代价一直投放宣传单张到北韩,"Park说,强调他一直有对抗北韩威胁的准备。
今年年底标普500(S&P 500)指数会在2650点上方吗?
萨姆·史密斯是一个风格多变的男人,他可以在奥蒂斯·雷丁、艾瑞莎·弗兰克林和雷·查尔斯以及像艾米·怀恩豪斯和阿黛尔这样的现代偶像的风格中随意转换。
这些专家都不是轻量级的。杰出的历史学家玛格丽特?麦克米伦(Margaret MacMillan)在2013年12月的一篇为布鲁金斯学会(Brookings)撰写的文章中说:“像1914年的世界一样,我们正在经历国际权力结构的转换,新兴大国正在挑战老牌大国。”她补充说,“如今,同样的一幕正发生在美国与中国,以及中国与日本之间”,同时她还表示,“中国与它另外两个邻国——越南和马来西亚——也有爆发冲突的可能性。”

"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

另外,Dua Lipa想要冲击三个奖项的,最后拿到了最佳艺人奖。虽然Harry Styles可能是One Direction最时尚的成员之一,但这位具有时代标志的歌手的皇冠意外地被MTV EMA的新人和前乐队的伴侣ZAYN抢走了。
Li Xiaojin, a professor at Civil Aviation University of China's Economics and Management College, said that rapidly increasing numbers of flights and limited airspace for civil aviation are the major reasons for delays.

最佳迷你剧/电影:《美国罪案故事:公诉辛普森》(“The People v. O. J. Simpson: American Crime Story”, FX)
愿新年的快乐一年四季常在。
The Microsoft founder's net worth is $86 billion, up from $75 billion last year.
Harvey C Mansfield, one of Harvard's most outspoken conservative professors and the author of a book called Manliness, also told the Guardian he questioned the decision. "The bounds of what is offensive have been extended and distorted, and I no longer trust the bent judgment of politically correct enforcers."

另一方面,10月份工业生产者出厂价格(PPI)连续第3个月同比下降5.9%。
《暮光之城》众星前照令人大跌眼镜
那么多的人视而不见,不承认事实。真相是泡沫无处不在,随时准备爆掉。证据越来越多,结论只有显而易见的一个:泡沫破灭的风险最高可达98%。2014年这次崩盘几乎是铁定要发生的,躲过这枚子弹的概率只有区区2%。
乔布斯在苹果平板电脑发布会上展示iPad,2010年1月,旧金山
人类在过去50年的平均寿命比人类存在的20万年中的平均寿命要长的多。目前,人类的平均寿命是70岁,1950年的平均寿命是47岁,两者存在很大的差异。

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

Belize's proximity to Mexico and the Caribbean ensures the street-food scene, providing an abundance of budget meal options.
节目35 歌曲《美丽中国》,沙宝亮 徐千雅

CDC

我祖母最喜欢的一首诗是威廉o埃内斯特o亨利的《不可征服》(Invictus)。我父亲把这首诗挂在厨房墙壁上,所以在成长过程中,我每天都会读到它:“我,是我命运的主宰。我,是我灵魂的统帅。”我能为每个人,特别是初入职场者提供的最好建议,就是欣然接受你作为命运主宰的角色。当机会出现时,抓住机会并敢于说“Yes!”
有些人仍坚持一种可称为“资源稀缺”的理论。该理论的核心是,资源开发遵循线性模式,低成本的资源最先被开发,也就是说,未来大部分乃至全部开发活动的成本一定会更高。遗憾的是,行业发展历史并不支持这一观点。过去几十年的经验表明,情况正相反。

The discovery has caused huge excitement among historians, as it provides firm evidence about a monarch whose life has been shrouded in controversy since his death at the Battle of Bosworth in 1485.
If Lloyd Grossman were to go through the keyholes of Oscar winners’ houses, he would find their golden statues in various spots: from prime real estate such as the mantelpiece to the depths of cupboards collecting dust.
Prince Miteb, who headed the powerful National Guard until early November, was released on November 28th, the official said. At least three other suspects have also finalized settlement deals.
蓝天在未来不会也不应该成为奢侈品。

vi
"People should just never walk away and leave their animals," Ms Lewis said. "Everyone has a legal obligation to look after animals in their care."
3. Dan Weiss “Fourteen” (Pi Recordings) There’s so much in “Fourteen,” the album-length composition by the drummer Dan Weiss: meticulous chamber maneuvers; avant-garde yowling; wordless vocals of new-music and northern Indian pedigree. More impressive than the expansive frame of reference is the fact that Mr. Weiss, marshaling about a dozen of his peers, spins it all into a flowing fabric.
With the majority of professional advisors (myself included) preaching the benefits of global diversification to their clients, 2014 looks more like a draw than an outright victory in the harsh light of December’s low winter sun. Consider the fact that, through last week, the MSCI World Index gained just 2% on the year, with nearly 5% drops for both the MSCI Emerging Markets index and the EAFE index of developed markets outside of the United States. Ironically, the single best-performing foreign market in the world, the Shanghai Composite of mainland Chinese equities (up 45%) is the only one that U.S. investors could not actually put their money into.

课程安排:每隔一个周末在芝加哥上课,共计大约18门课程,包括4门选修课。学员在芝加哥住校学习3周,在香港和伦敦分别学习1周。
有人会认为卡莉·西蒙演唱的《海底城》的主题曲最好听。他们可能有自己的理由,可能是因为这是"邦德电影中最好听的歌曲"。曲调欢快、充满吸引力、浪漫抒情,卡莉西蒙的演唱打动人心。但是这些对詹姆斯·邦德、他的冒险旅程、他的来历甚至他的电影没有任何特殊引导作用。尽管《没人做得更好》被认为是一首好歌,但是由于上述原因它并没能进入榜单前五名。
A person walks through snow Tuesday in Belington, West Virginia. Superstorm Sandy buried parts of West Virginia under more than a foot of snow on Tuesday.
在接下来的几个月里,金州勇士就恢复正常了。因为凯文·杜兰特受伤,让斯蒂芬·库里重新成为那个无所不能的斯蒂芬·库里,当凯文·杜兰特重返球队的时候,球队也在他们这两个MVP之间找到了平衡。于是季后赛横扫西部的可怕爆发显然可以预料得到。开拓者被打的毫无还手之力,爵士拼尽全力但仍无法获得一场比赛。本来马刺很有可能拿下一场比赛,在那场比赛中他们一度领先20分,然后,当扎扎帕楚里亚垫了一只脚之后,科怀·伦纳德便受伤了,结果就是这样。
该调查基于160多项指标的统计数据,包括衣食、家政服务、交通和公用设施的花费。

眼下,合格的供应链经理极度缺乏,在那些分支机构遍布全球的跨国公司中尤其如此。究其原因,不外以下两点。
This figure marks the highest rate of growth since 2011. As the total annual box office in China five years ago was only 10 billion yuan.
威廉姆斯指出,来自巴西、越南、台湾和智利的11月初数据表明,出口形势自10月以来持续改善。
这部亚当·桑德勒和德鲁·巴里摩尔主演的轻松浪漫喜剧,似乎最不能反映现实生活,但实际上它确实部分基于真实故事。桑德勒扮演的兽医爱上了巴里摩尔,而她的记忆每天都会重置。他了解到,车祸造成创伤性脑损伤后,她就一直在重播同一天。因为她一直生活在谎言中,桑德勒的角色很苦恼,并制作了一系列录像,解释她的车祸和生活,给她每天早上看。
Shipments to China cratered by 14.4 per cent year-on-year to Rmb737.5bn in January. That’s from a 4 per cent drop in December, and versus expectations for a 1.8 per cent rise.

The first is the establishment of the Aero Engine Corp. of China (AECC) last year, which consolidates Chinese aero-engine know-how and capabilities, indicating that the indigenous development of aircraft engines is now a strategic priority for China. This focus is even more striking when one realizes that China now has access to rhenium, a rare metal that helps create strong superalloys necessary for the manufacture of high-pressure jet engine turbine blades. Since the 2010 discovery in the Shaanxi province of reserves, which account for 7% of the world’s total, considerable effort has been made to exploit and process this metal. Moreover, a major technological milestone was recently achieved that opens the door for mass production of single-crystal turbine blades, a key component of modern jet engines. It is thus no surprise that one of the cornerstones of the newly established joint Sino-Russian widebody aircraft program is the development of a dedicated, state-of-the-art engine.
奥巴马在该推文中引用曼德拉的话称:“没有人生来就因为他人的肤色、背景或宗教信仰而憎恨他们……”
在电影《007:大破天幕杀机》中饰演邦女郎的贝纳尼丝·玛尔洛(Berenice Marlohe),已经确认加盟导演特伦斯·马立克(TerrenceMalick)执导的最新电影作品,目前此影片正在奥斯汀进行拍摄。
Trade flows brought China’s balance of trade to $40.82bn, roughly $7.2bn below expectations and down about $3.6bn from November’s revised level of $44.23bn (previously $44.61bn). That balance came to Rmb275.4bn in local-currency terms.

The host list of 2014 Spring Festival Gala, including Zhu Jun, Dong Qing, Bi Fujian, Li Sisi and Zhang Guoli, are released on Wednesday. Chinese film actor and director Zhang Guoli will host the annual gala of China Central Television (CCTV) for the first time.
准时完成你的工作。即使还有额外的任务,也要如此。
他们在官方的欢迎仪式上也迟到了40分钟,在温哥华的一场活动中也迟到了。
The auction house said today that the auction, featuring two diamonds over 100 carats, drew buyers from more than 30 countries.
n. 学会,学院,协会
脸型。不要吃!要瘦!瘦出能切开黄油的颧骨。

?All the Bond actors have been tall. This isn't a coincidence. A man who is five foot six needs to earn $175,000 a year more a year to be as attractive as a man who is six feet tall. A lot of people commented on Daniel Craig's buff physique in Casino Royale. Once again the depiction clicks with the research: muscular men have more one night stands and you can tell how many women a guy has slept with by the size of his arms. That chiseled torso may mean he's a better lover.
影片可能太过非主流,不具有获得大奖的影响力。
很多人相信,对于中国资源环境来讲,人口已不再是主要威胁。相反,中国的人口危机已转变成出生率过低,社会老龄化加剧以及性别比例失衡。在中国的珠江三角洲等地已经出现了技工短缺的现象,所以不久以后,我们可能将看到计生政策上的重大变革。

《胡润百富榜》追踪逾2000名净财富在3亿美元或以上的民营企业家,今年的榜单新增了179位富豪。
adj. 稳定的,安定的,可靠的
政治也对气候的认知有所影响,超过3/4的民主党人和六成独立派人士认为在过去几年中气候越来越极端,而不到半数共和党人认同这种转变。
8. Julia Roberts - $12 million
The Shape of Water