Lorenzo Asti - Università di Roma La Sapienza # A statistical mechanics approach to autopoietic immune networks # In this work we present a model for a systemic approach to the immune system. In particular we develop a model to describe the idiotypic network, namely the network formed by different B-cell clones that interact via an antibody/anti-antibody mechanism. The immunoglobulines are modeled as binary strings and the (weighted) interaction is based on complementarily rule. In the nodes of the resulting network families of Ising spins are placed, whose states represents the quiescent/firing state of a linfocite. With this model the most important features of immune system such as low-dose tolerance, dynamical memory, bell shaped response and self/non-self distinction are recovered as emergent properties.