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Quantitative Analysis of COVID‐19 Pandemic Responses Based on an Improved SEIR‐SD Model

Author

Listed:
  • Yang Liu
  • Bingrui Liu
  • Yi Deng
  • Jia Liu

Abstract

In late 2019, the COVID‐19 pandemic began to spread over the world, causing millions of deaths. In the first few months of the pandemic, several countries (such as China) prevented the spread of the pandemic successfully. By contrast, the pandemic in many other countries was not controlled well. For example, India encountered a second serious outbreak of COVID‐19 from April 2021 due to the poor resistance measures implemented by the government. To figure out the effective countermeasures to the pandemic, this research proposes a COVID‐19 pandemic and its response system, which consists of the infection subsystem, the quarantine subsystem, and the medical subsystem. On this basis, an improved SEIR‐SD model is established which is utilized to analyze the response measures to the pandemic quantitatively. This model successfully simulates the actual epidemic scenarios in Wuhan, which verifies its effectiveness. Afterward, the impact of hospital administration rate, quarantine rate, average contact number, and contact infection rate on the cumulative number of infections and deaths are analyzed by simulation. The results show that both the medical and administrative efforts, especially in the early stage of the epidemic, are significant in reducing the number of infections and shortening the epidemic period. In the medical aspect, the more stringent quarantine brings the earlier inflection point of the epidemic; more importantly, improving the treatment rate significantly reduces the scale of the epidemic. In the administrative aspect, enforcing individual protection and strict community closure can effectively cut off the transmission of the virus and curb the spread of the epidemic. Finally, this research proposes several practical suggestions in response to the COVID‐19 pandemic. The main contribution of this research is that the effects of different response measures on the number of new infections daily and the cumulative number of deaths of a country or region in the COVID‐19 pandemic are estimated quantitatively based on modeling and simulation.

Suggested Citation

  • Yang Liu & Bingrui Liu & Yi Deng & Jia Liu, 2022. "Quantitative Analysis of COVID‐19 Pandemic Responses Based on an Improved SEIR‐SD Model," Complexity, John Wiley & Sons, vol. 2022(1).
    • Handle: RePEc:wly:complx:v:2022:y:2022:i:1:n:6221181
    DOI: 10.1155/2022/6221181
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    1. Kevin Linka & Mathias Peirlinck & Francisco Sahli Costabal & Ellen Kuhl, 2020. "Outbreak dynamics of COVID-19 in Europe and the effect of travel restrictions," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 23(11), pages 710-717, August.
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