Author: Feng Lin; Yi Huang; Huifang Zhang; Xu He; Yonghua Yin; Jiaxin Liu
Title: Evaluating the different control policies for COVID-19 between mainland China and European countries by a mathematical model in the confirmed cases Document date: 2020_4_22
ID: lgdsi48m_8
Snippet: In this work, the variable S(t) which denotes the number of the susceptible cases in SIR model is related to the number of the close contacts. By retrospective study, the total number of the close contacts is 6.9×10 5 . However, as the epidemic situation is changeable, it is difficult to give the exact number of close contacts, which are the susceptible population. Moreover the number of the close contacts is increasing day by day, while the inf.....
Document: In this work, the variable S(t) which denotes the number of the susceptible cases in SIR model is related to the number of the close contacts. By retrospective study, the total number of the close contacts is 6.9×10 5 . However, as the epidemic situation is changeable, it is difficult to give the exact number of close contacts, which are the susceptible population. Moreover the number of the close contacts is increasing day by day, while the infected number of population is growing. So it could be deduced that in fact the exact number of the close contacts is unknown. For these reasons, the mechanism of infection-recovering-death is given by (1)-(4):
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