The optimization of immune system, "decisions".
D000917:Antibody Formation; D000918:Antibody Specificity; D000937:Antigen-Antibody Reactions; D006801:Humans; D007114:Immunization; D008288:Malaria / Q000276:immunology; D008954:Models, Biological; D014123:Toxoplasmosis / Q000276:immunology; D014352:Trypanosomiasis / Q000276:immunology