Minutes of the third meeting of the AIDS group of Haemophilia Centre Directors in April 1985. Discusses test for HTLV III antibody, commercial kits, antigen tests, reporting of HTLV III antibody test results, new cases of AIDS/ARC, update on laboratory testing and clinical problems. Discusses a new case of AIDS in a mild haemophiliac who had only received one transfusion in 1981 but was given multiple different batches of concentrate.