Immune Response to a Variable Pathogen: A Stochastic Model with Two Interlocked Darwinian Entities

Figure 1

Schema of a Darwinian entity. An individual is singled out from the population. A period of one generation is shown. Incidental copying error occurs during multiplication (changed genotype resulting in changed phenotype) with new fitness in reference to its structured environment. The probability of being selected to survive is given according to new fitness.