tetano
Editor, Senior Moderator
Int J Infect Dis
. 2021 Apr 13;S1201-9712(21)00332-5.
doi: 10.1016/j.ijid.2021.04.021. Online ahead of print.
Modeling the complete spatiotemporal spread of the COVID-19 epidemic in mainland China
Bisong Hu[SUP] 1 [/SUP], Pan Ning[SUP] 2 [/SUP], Jingyu Qiu[SUP] 3 [/SUP], Vincent Tao[SUP] 4 [/SUP], Adam Thomas Devlin[SUP] 5 [/SUP], Haiying Chen[SUP] 6 [/SUP], Jinfeng Wang[SUP] 7 [/SUP], Hui Lin[SUP] 8 [/SUP]
Affiliations
Abstract
Objectives: The outbreak of novel coronavirus (COVID-19) epidemic is reaching its final phase in China. The complete epidemic data are available for a complete assessment of epidemiological parameters in all regions and time periods.
Methods: This study aims to present a spatiotemporal epidemic model based on spatially stratified heterogeneity (SSH) to simulate the epidemic spread. A susceptible-exposed/latent-infected-removed (SEIR) model was constructed for each SSH-identified stratum (each administrative city) to estimate the spatiotemporal epidemiological parameters of the outbreak.
Results: We estimated that the mean latent and removed periods were 5.40 and 2.13 days, respectively. There was an average of 1.72 latent or infected persons per 10,000 Wuhan travelers to elsewhere until January 20[SUP]th[/SUP], 2020. The space-time basic reproduction number (R[SUB]0[/SUB]) estimates indicate an initial value between 2 and 3.5 in most cities on this date. The mean period for R[SUB]0[/SUB] estimates to decrease to 80% and 50% of initial values in cities were an average of 14.73 and 19.62 days, respectively.
Conclusions: Our model estimates the complete spatiotemporal epidemiological characteristics of the outbreak in a space-time domain, and the findings will help enhance a comprehensive understanding of the outbreak and inform the strategies of prevention and control in other countries worldwide.
Keywords: COVID-19; SEIR model for a stratum; latent and infection ratio; mainland China; space-time R(0); spatially stratified heterogeneity.
. 2021 Apr 13;S1201-9712(21)00332-5.
doi: 10.1016/j.ijid.2021.04.021. Online ahead of print.
Modeling the complete spatiotemporal spread of the COVID-19 epidemic in mainland China
Bisong Hu[SUP] 1 [/SUP], Pan Ning[SUP] 2 [/SUP], Jingyu Qiu[SUP] 3 [/SUP], Vincent Tao[SUP] 4 [/SUP], Adam Thomas Devlin[SUP] 5 [/SUP], Haiying Chen[SUP] 6 [/SUP], Jinfeng Wang[SUP] 7 [/SUP], Hui Lin[SUP] 8 [/SUP]
Affiliations
- PMID: 33862212
- DOI: 10.1016/j.ijid.2021.04.021
Abstract
Objectives: The outbreak of novel coronavirus (COVID-19) epidemic is reaching its final phase in China. The complete epidemic data are available for a complete assessment of epidemiological parameters in all regions and time periods.
Methods: This study aims to present a spatiotemporal epidemic model based on spatially stratified heterogeneity (SSH) to simulate the epidemic spread. A susceptible-exposed/latent-infected-removed (SEIR) model was constructed for each SSH-identified stratum (each administrative city) to estimate the spatiotemporal epidemiological parameters of the outbreak.
Results: We estimated that the mean latent and removed periods were 5.40 and 2.13 days, respectively. There was an average of 1.72 latent or infected persons per 10,000 Wuhan travelers to elsewhere until January 20[SUP]th[/SUP], 2020. The space-time basic reproduction number (R[SUB]0[/SUB]) estimates indicate an initial value between 2 and 3.5 in most cities on this date. The mean period for R[SUB]0[/SUB] estimates to decrease to 80% and 50% of initial values in cities were an average of 14.73 and 19.62 days, respectively.
Conclusions: Our model estimates the complete spatiotemporal epidemiological characteristics of the outbreak in a space-time domain, and the findings will help enhance a comprehensive understanding of the outbreak and inform the strategies of prevention and control in other countries worldwide.
Keywords: COVID-19; SEIR model for a stratum; latent and infection ratio; mainland China; space-time R(0); spatially stratified heterogeneity.