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Periodic traveling wavefronts of a multi-type SIS epidemic model with seasonality

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Abstract

This paper is concerned with a time-periodic and nonlocal system arising from the spread of a deterministic epidemic in multi-types of population by incorporating a seasonal variation. The existence of the critical wave speed of the periodic traveling wavefronts and its coincidence with the spreading speed were proved in Wu et al. (J Math Anal Appl 463:111–133, 2018). In this paper, we prove the uniqueness and stability of all non-critical periodic wavefronts. Of particular interest is the influences of time-periodicity on the spreading speed in one-dimensional case. It turns out that, in comparison with the autonomous case, the periodicity of the infection rate increases the spreading speed, while the periodicity of the combined death/emigration/recovery rate for infectious individuals decreases the spreading speed. We also find that the contact distribution increases the spreading speed.

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Acknowledgements

The authors are very grateful to the anonymous referees for careful reading and helpful suggestions which led to an improvement in our original manuscript.

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Authors and Affiliations

  1. School of Mathematics and Statistics, Xidian University Xi’an, Shaanxi, 710071, People’s Republic of China

    Haiqin Zhao & Yumeng Gu

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  1. Haiqin Zhao
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  2. Yumeng Gu
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Correspondence to Haiqin Zhao.

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H. Zhao Partially supported by the NSF of China (11501482) and the NSF of Shaanxi Province of China (2018JM1006).

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Zhao, H., Gu, Y. Periodic traveling wavefronts of a multi-type SIS epidemic model with seasonality. Z. Angew. Math. Phys. 71, 63 (2020). https://doi.org/10.1007/s00033-020-1284-y

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  • DOI: https://doi.org/10.1007/s00033-020-1284-y

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