Power-law multi-wave model for COVID-19 propagation in countries with nonuniform population density

Pavel Grinchuk, Sergey Fisenko

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Quant. Biol. ›› 2022, Vol. 10 ›› Issue (2) : 150-156. DOI: 10.15302/J-QB-022-0301
RESEARCH ARTICLE

Power-law multi-wave model for COVID-19 propagation in countries with nonuniform population density

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Abstract

Background: The purpose of our study is to develop a quite precise mathematical model which describes epidemics spread in a country with non-uniform population density. This model gives explanation of quite long duration of the peak of a respiratory infection such as the coronavirus disease 2019 (COVID-19).

Methods: The theory of kinetic equations and fractal analysis are used in our mathematical model. According to our model, COVID-19 spreading takes the form of several spatio-temporal waves developing almost independently and simultaneously in areas with different population density. The intensity of each wave is described by a power-law dependence. The parameters of the dependence are determined by real statistical data at the initial stage of the disease spread.

Results: The results of the model simulation were verified using statistical data for the Republic of Belarus. Based on the developed model, a forecast calculation was made at the end of May, 2020. It was shown that the epidemiological situation in the Republic of Belarus is well described by three waves, which spread respectively in large cities with the highest population density (the first wave), in medium-sized cities with a population of 50−200 thousands people (the second wave), in small towns and rural areas (the third wave). It was shown that a new wave inside a subpopulation with a lower density was born 20−25 days after the appearance of the previous wave. Comparison with actual data several months later showed that the accuracy of forecasting the total number of cases for a period of 3 months for total population in the proposed approach was approximately 3%.

Conclusions: The high accuracy mathematical model is proposed. It describes the development of a respiratory epidemic in a country non-uniform population density without quarantine. The model is useful for predicting the development of possible epidemics in the future. An accurate forecast allows to correctly allocating available resources to effectively withstand the epidemic.

Author summary

Mathematical model of epidemic spread is developed. Using the first empirical data, the model gives high accuracy prediction about parameters of waves of epidemics spread for country with non-uniform population density. Wave parameters include the duration and the intensity. It is verified for the Republic of Belarus data.

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Keywords

COVID-19 / forecast model / simultaneous waves / population density

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Pavel Grinchuk, Sergey Fisenko. Power-law multi-wave model for COVID-19 propagation in countries with nonuniform population density. Quant. Biol., 2022, 10(2): 150‒156 https://doi.org/10.15302/J-QB-022-0301

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ACKNOWLEDGMENTS

This work was supported by the Belarussian Republican Foundation for Fundamental Research (No. T21COVID-033).

COMPLIANCE WITH ETHICS GUIDELINES

The authors Pavel Grinchuk and Sergey Fisenko declare that they have no conflict of interest or financial conflicts to disclose. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted, and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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This article is licensed by the CC By under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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2022 The Author (s). Published by Higher Education Press.
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