SIR-Model for Households

Donges, Philipp; Gotz, Thomas; Kruger, Tyll; Niedzielewski, Karol; Priesemann, Viola; Schafer, Moritz

SIR-Model for Households

Abstract

Households play an important role in disease dynamics. Many infections happening there due to the close contact, while mitigation measures mainly target the transmission between households. Therefore, one can see households as boosting the transmission depending on household size. To study the effect of household size and size distribution, we differentiated the within and between household reproduction rate. There are basically no preventive measures, and thus the close contacts can boost the spread. We explicitly incorporated that typically only a fraction of all household members are infected. Thus, viewing the infection of a household of a given size as a splitting process generating a new, small fully infected sub–household and a remaining still susceptible sub–household we derive a compartmental ODE model for the dynamics of the sub–households. In this setting, the basic reproduction number as well as prevalence and the peak of an infection wave in a population with given households size distribution can be computed analytically. We compare numerical simulation results of this novel household–ODE model with results from an agent–based model using data for realistic household size distributions of different countries. We find good agreement of both models showing the catalytic effect of large households on the overall disease dynamics.

Keywords

COVID–19 epidemiology disease dynamics SIR–model social structure

Citation

Philipp Donges, Thomas Gotz, Tyll Kruger, Karol Niedzielewski, Viola Priesemann, Moritz Schafer. “Sir-Model for Households.” arXiv.Org, 11 Jan. 2023, https://doi.org/10.48550/arXiv.2301.04355

URI

https://depot.ceon.pl/handle/123456789/22764

Belongs to collection

Artykuły ICM / ICM Articles

Full item record