Abstract
In order to eliminate the disease with few immunized nodes and high speed,a great many immunization strategies have been proposed.Acquaintance immunization strategy is the most effective of local strategies.Based on the BA scale-free network's rich-club phenomenon and breadth first search,the paper proposed search immunization strategy based on the rich-club phenomenon which requires only local degree information.There are two types of immunization strategies,which depend on searching the neighbors' degree differently,and can also be used with different cost required.RPBSI algorithm can lead to the eradication of the epidemic by immunizing a smaller fraction of the nodes than the acquaintance immunization in BA scale-free network and scientific collaboration networks.
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