Substantial undocumented infection facilitates the rapid dissemination of CoV2

栏目: IT技术 · 发布时间: 4年前

内容简介:Estimation of the prevalence and contagiousness of undocumented novel coronavirus (SARS-CoV2) infections is critical for understanding the overall prevalence and pandemic potential of this disease. Here we use observations of reported infection within Chin

Abstract

Estimation of the prevalence and contagiousness of undocumented novel coronavirus (SARS-CoV2) infections is critical for understanding the overall prevalence and pandemic potential of this disease. Here we use observations of reported infection within China, in conjunction with mobility data, a networked dynamic metapopulation model and Bayesian inference, to infer critical epidemiological characteristics associated with SARS-CoV2, including the fraction of undocumented infections and their contagiousness. We estimate 86% of all infections were undocumented (95% CI: [82%–90%]) prior to 23 January 2020 travel restrictions. Per person, the transmission rate of undocumented infections was 55% of documented infections ([46%–62%]), yet, due to their greater numbers, undocumented infections were the infection source for 79% of documented cases. These findings explain the rapid geographic spread of SARS-CoV2 and indicate containment of this virus will be particularly challenging.


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疯狂的站长

疯狂的站长

温世豪 / 清华大学出版社 / 2010年05月 / 29.00元

受全球性金融危机的影响,就业变得越来越困难,众多青年,包括大学毕业生,无不感到就业的巨大压力,站长这一职业不但创业门槛低,而且还自由自在。其实,搭建一个网站是相当简单的,但要成为一名成功的站长则不那么容易。 本书作者是一名站长,从事互联网相关工作已十余年,自已也在经营一个知名网站,积累了大量网站运营经验。作者结合自身真实的“疯狂”创业经历,以平实、通俗的语言讲述如何从零开始起步,最终成为一名......一起来看看 《疯狂的站长》 这本书的介绍吧!

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