title: [The defense mechanism and its weakening: generation of the immune system].
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology; D006133:Growth Substances / Q000378:metabolism; D006680:HLA Antigens / Q000276:immunology; D006649:Histocompatibility Antigens / Q000276:immunology; D006801:Humans; D007376:Interleukin-2 / Q000378:metabolism; D015847:Interleukin-4; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D006133:Growth Substances; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D007376:Interleukin-2; D008222:Lymphokines; D015847:Interleukin-4