In Geneva an HIV voluntary counselling and testing (VCT) consultation for migrants exists in a primary care center. A semi-structured questionnaire, was filled out during the VCT consultations. 650 questionnaires were analyzed. 82 % were asylum seekers. 30 % said they did not really understand how HIV is transmitted and 27 % cited erroneous modes of contamination. 78 % of women who did not use condoms regularly gave having a stable partner as the reason compared to 49 % for men. VCT is a great prevention tool : the counseling accompanying the test provides an opportunity to openly raise various risk practices and to personalize the information. However, this requires a suitable and affordable structure.