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Effectiveness of Closure of Public Places with Time Delay in Disease Control
Wang, Zhenggang ; Szeto, Kwok Yip ; Leung, Frederick ChiChing
Journal of Integrative Bioinformatics  JIB (ISSN 16134516)
Abstract:
A theoretical basis for the evaluation of the effciency of quarantine measure is developed in a SIR model with time delay. In this model, the effectiveness of the closure of public places such as schools in disease control, modeled as a high degree node in a social network, is evaluated by considering the effect of the time delay in the identification of the infected. In the context of the SIR model, the relation between the number of infectious individuals who are identified with time delay and then quarantined and those who are not identified and continue spreading the virus are investigated numerically. The social network for the simulation is modeled by a scale free network. Closure measures are applied to those infected nodes with high degrees. The effectiveness of the measure can be controlled by the present value of the critical degree KC: only those nodes with degree higher than KC will be quarantined. The cost CQ incurred for the closure measure is assumed to be proportional to the total links rendered inactive as a result of the measure, and generally decreases with KC, while the medical cost CQ incurred for virus spreading increases with KC. The total social cost (CM + CQ) will have a minimum at a critical K*, which depends on the ratio of medical cost coeffcient aM and closure cost coeffcient áQ. Our simulation results demonstrate a mathematical procedure to evaluate the effciency of quarantine measure. Although the numerical work is based on a scale free network, the procedure can be readily generalized and applied to a more realistic social network to determine the proper closure measure in future epidemics.
Beteiligte Einrichtung: 

Technische Fakultät, Arbeitsgruppen der Informatik 
DDCSachgruppe: 

Datenverarbeitung, Informatik 
ZitatVorschlag:
Wang, Zhenggang ; Szeto, Kwok Yip ; Leung, Frederick ChiChing ( 2008) Effectiveness of Closure of Public Places with Time Delay in Disease Control.
Journal of Integrative Bioinformatics  JIB (ISSN 16134516), 5(2), 2008
OnlineJournal: http://journal.imbio.de/index.php?paper_id=96
URL:
http://biecoll.ub.unibielefeld.de/volltexte/2008/290
