Author: Peng Shao
Title: Impact of city and residential unit lockdowns on prevention and control of COVID-19 Document date: 2020_3_17
ID: fkwskhfk_1
Snippet: A novel coronavirus was identified as the cause of viral pneumonia outbreaks in Wuhan, China, in 2019. The World Health Organization officially termed this novel virus COVID-19 and publicly announced this on February 11, 2020. Patients infected with COVID-19 can be asymptomatic carriers [1] and infect others despite having no obvious symptoms. Because many infected patients are not or mildly symptomatic, identification of the chain of transmissio.....
Document: A novel coronavirus was identified as the cause of viral pneumonia outbreaks in Wuhan, China, in 2019. The World Health Organization officially termed this novel virus COVID-19 and publicly announced this on February 11, 2020. Patients infected with COVID-19 can be asymptomatic carriers [1] and infect others despite having no obvious symptoms. Because many infected patients are not or mildly symptomatic, identification of the chain of transmission and contact tracing have become extremely complicated [2] . Some studies of COVID-19 have used mathematical models and computer technologies to simulate and predict COVID-19 transmission [3] [4] [5] . For example, public health investigators evaluated the COVID-19 epidemic in China during the initial phase [6] .
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