title: Different rules govern help for cytotoxic T cells and B cells.
mesh_terms: D000818:Animals; D000956:Antigens, Viral; D001402:B-Lymphocytes / Q000276:immunology*; D003602:Cytotoxicity, Immunologic; D005802:Genes, MHC Class II; D006183:H-2 Antigens / Q000235:genetics; D007108:Immune Tolerance; D008211:Lymphocyte Cooperation; D008264:Macrophages / Q000276:immunology; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology*; D014616:Vaccinia virus / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D006183:H-2 Antigens