[Analysis on the epidemic factors for the Corona Virus Disease]

H Y Yang, G C Duan
Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine] 2020 March 3, 54: E021
Since December 2019, corona virus disease 2019 (COVID-19) , an emerging infection disease occurred in Wuhan, has spread in the mainland China. The epidemic factors on the basis of knowledge of SARS-CoV-2 were discussed in this paper. This puts a lot of pressure on clinical resources and care. SARS-CoV-2 is a novel corona virus, the onset of COVID-19 is slow, and the pathogenesis of SARS-CoV-2 remains unclear and may lead to multiple organ damage. These put a lot of pressure on clinical resources and care. Source of infection including the patients, asymptomatic carrier and patients in the incubation period are contagious. It is difficult to control source of infection. Routes of SARS-CoV-2 transmission are diversified and the main routes of transmission for COVID-19 are droplet transmission and close contact transmission. All population have susceptibility to SARS-CoV-2. Social factors such population movements and aggregation accelerated the spread of SARS-CoV-2. The Chinese government's adopted measures are positive and effective, and are accepted by the expert group from the World Health Organization. However, it will be a long-term hard work in the future to seriously summarize and think deeply to achieve public health security in China.

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