Research on immunization strategy to risk of virus type in supply chain

The prevention from risk of virus type is one of the main contents of the risk management in supply chain. This paper has studied the immune effect of three immunization strategies on risk of virus type in different supply chains. When the supply chain is a homogeneous network, the adopting of the random immunization strategy to prevent risk of virus type is more effective; while when the supply chain is a inhomogeneous network, the random immunization strategy is failure. In this case, the adopting of the target immunization strategy is more effective; however, because some of the preconditions needed when using the target immunization strategy are difficult to get satisfied, practically, it is often to use acquaintance risk prevention instead of the target immunization strategy. This research has provided the theoretical basis for adopting the correct immunization strategy to prevent the risk propagation of the virus type in supply chain.