title: On the role of viruses in the evolution of immune responses.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000918:Antibody Specificity; D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D007156:Immunologic Memory; D008285:Major Histocompatibility Complex; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology; D014777:Virus Diseases / Q000276:immunology; D014780:Viruses / Q000276:immunology*