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Updated: Jul 16, 2026
16:14
Trajectory Data Analyses for Pedestrian Space-time Activity Study
Published on: February 25, 2013
Targeted interventions suppress epidemic outbreaks in spatial higher-order activity-driven networks.
Wenbin Gu1, Wenjie Li1, Meng Cai2
1School of Public Health, Chongqing Medical University, Chongqing, China.
Chaos (Woodbury, N.Y.)
|July 15, 2026
Summary
Higher-order interactions in urban settings accelerate disease outbreaks. Effective containment requires targeted interventions and isolation strategies that consider screening bias and testing scale, not just isolation strictness.
Area of Science:
- Epidemiology
- Network Science
- Computational Social Science
Background:
- Traditional epidemic models inadequately represent group-based infection risks in dense urban areas.
- Higher-order interactions in shared spaces are key drivers of explosive contagion.
- Existing models fail to capture the complexity of real-world social networks.
Purpose of the Study:
- To develop a novel framework for simulating complex contagion processes in urban environments.
- To investigate the impact of higher-order interactions on epidemic spreading dynamics.
- To evaluate the effectiveness of different intervention strategies, including screening and isolation.
Main Methods:
- Developed a spatial activity-driven higher-order framework.
- Integrated agent-based mobility modeling with the microscopic Markov chain approach.
- Analyzed epidemic thresholds using a derived basic reproduction number considering biological weight, higher-order enhancement, and structural spectral radius.
Main Results:
- Higher-order interactions significantly advance outbreak peaks by intensifying localized infection pressure.
- Targeted interventions based on activity levels are essential for containment, amplified by test scale.
- Isolation efficacy is critically dependent on screening bias and the coupling between testing scale and screening bias.
Conclusions:
- Epidemic thresholds are governed by biological weight, higher-order enhancement, and structural spectral radius.
- The effectiveness of strict isolation hinges on the interplay of testing scale and screening bias in higher-order networks.
- Optimizing public health strategies requires synchronizing resource allocation with precise targeting of social hubs to counteract accelerated outbreaks.
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