Fever, mechanical and chemical barriers, immunoglobulin, receptor, thymus, phagocytosis, inflammation, lymphatic organs, messenger molecules (cytokines, interleukins…), agglutination, peptide, memory cells, immunological memory, B-plasma cells, cytotoxic cells (=cytotoxic T-Lymphocytes), thymus, T helper cells (=CD4 cells), APC (=Antigen presenting cell), phagocytosis, cell clone, clonal selection, somatic recombination, autoimmune disease, Macrophage, precipitation of soluble antigens pairs of terms: innate and specific immune response, self and no self, MHCI/II, humoral and cellular immune response, primary and secondary response, activation phase and effector phase, monoclonal and polyclonal antibodies, antibody and receptor, antibody and antigen, heavy chain and light chain, active and passive immunization, B- and TLymphocytes