Immune System Modelling and Simulation
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by the idiotypic fi eld h
i
. These equations are used to study the
dynamical regimes: oscillatory, chaotic, etc.
Modelling natural phenomena by means of differential
equations has always been the way of doing. However, in the
use of differential equations to model the immune system,
one can spot three main limitations that are worth a moment
of refl ection. First, differential equations assume the existence
of suffi ciently large populations of homogeneous entities. Yet,
each cell of the immune system has a unique life history that
defi nes its interaction with the environment, so that averaging
over populations is often inadequate. The typical solution to
this problem is to divide the cells into classes ...