摘要: Membrane Computing (MC) or so called P system is a computing machine that was first introduced by Gheorghe Paun in 1998. MC; being inspired from biological reactions occurring inside living cell; represents new methodology for writing algorithms and thinking. In this paper we borrow some immunity flavor add it to the framework of MC. The addition way thinking designing MC algorithms. It eliminates need checking phase an algorithm. There can be many interpretations concept adding Immunity systems. paper, one interpretation which interpreted as set rules protects membranes against generation evolution unwanted objects. Hence; guaranteed if developed answer then correct otherwise final step will reached with no membranes.