Cellular basis of immune responses.
D000818:Animals; D000917:Antibody Formation; D000937:Antigen-Antibody Reactions; D001717:Birds; D002060:Bursa of Fabricius / Q000276:immunology; D006801:Humans; D007109:Immunity; D007111:Immunity, Cellular; D008214:Lymphocytes / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology