Adaptive and innate immunity, Dr D.Male and Prof I.Roitt; Cells involved in the immune response, Dr P.Lydyard and Prof Grossi; the lymphoid system, Dr P.Lydyard and Prof C.Grossi; major histocompatibility complex, Dr M.Owen; molecules which recognise antigen, Dr M.Turner; the generation of antibody diversity, Dr F.Hay; antigen recognition, Professor M.W.Steward; cell cooperation in the antibody response, Professor M.Feldman and Dr D.Male; cell-mediated immune response, Dr G.Rook; regulation of the immune response, Dr R.Taylor; genetic control of immunity, Dr A.Cooke; immunological tolerance, Dr J.Howard and Dr D.Male; complement, Dr M.J.Walport; development of the immune system, Dr P.Lydyard and Prof C.Grossi; evolution of immunity, Dr J.Horton and Dr A.Lackie; immunity to protozoa and worms, Dr.J.Taverne; immunity to tumours, Dr M.Moore and Dr M.Dawson; hypersensitivity - type I, Dr J.Brostoff and Dr A.Hall; hypersensitivity - type II, Dr D.Male; hypersensitivity - type III, Dr F.Hay; hypersensitivity - part IV, Prof R.Barnetson and Dr D.J.Gawkrodger; autoimmunity and autoimmune disease, Professor I.Roitt; transplantation and rejection, Professor M.Steward and Dr D.Male; immunological techniques, Dr K.Welsh and Dr D.Male.