Tssues: The access to the Internet is growing fast in Brazil. Most STD/HIV information available on Internet is in English. Tnformation on HIV prevention should be given continuous!y and in a cultural sensitive way. Besides mass media communication, there is a constant need for individual counseling. Description: Viva Cazuza Society (VCS) is a Brazilian NGO that works with HIV care and prevention sínce 1990. In May 1999, VCS launched the HIV/AIDS Scientific Forum website (www.vivacazuza.gov.br/forum.htm), a partnership with Johns Hopkins University and the Brazilian Ministry of Health, with a team of STD/HIV specialists. This interactive service provides online information in Portuguese on HIV care for healfh care works and PLWAs and counseling to general population. The website has an average of 14.000 visits and 400 questions per month. Among all the questions, 56% were about individual counseling, 20% were about opportunistic infections and natural history of HIV infection, 17% were about antiretroviral therapy and 7% were about STDs. Lessons learned: Despite the massive information on HIV transmission, individual counseling is a fundamental tool for ‘prevention, mainly for young people, whose doubts on sexuality are not addressed by mass media information. Internet allows for individual counseling and at the same time makes it available to other readers. The questions profile gives an useful orientation for prevention messages. Recommendation: The expericnce of an interactive site on STD/HIV information points to the reinforcement of mass media interventions addressing individual counseling. The usefulness of this experience will grow together with the widespread use of the Internet in Brazil and other Portuguese speaking countries in Africa.