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Title: Optimal time delay in the control of epidemic
Authors: Wang, Zhenggang
Szeto, Kwok-Yip
Leung, Frederick Chi-Ching
Keywords: Epidemics
Isolation measures
SIR model
Issue Date: 2009
Citation: Nature Inspired Cooperative Strategies for Optimization (NICSO 2008). Studies in Computational Intelligence, v. 236, 2009, p. 253-260
Abstract: A mathematical model to address the efficiency of the isolation and quarantine strategies in the containment of epidemics is constructed based on the SIR model with time delay. The model is investigated with numerical simulation that demonstrates the importance of quick measure in identifying the infected andthe subsequent quarantine of his/her neighbors. The model also provides a theoretical framework for the estimation of the cost involved in the containment of the epidemics. Based on a general estimate of the cost, we demonstrate the procedure for the calculation of the optimal set of parameters in our isolation and quarantine strategy through numerical simulation on a model social network. We find an important parameter π which is a combination of several general parameters for the SIR model so that when π >0, the isolation and quarantine strategy will fail to contain the outbreak. The procedure outlined provides some general guidance in the selection of strategies in the containment of real epidemics, where the balance between social cost and risk must be carefully handled.
Rights: The original publication is available at
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