7,000 people learned they were HIV-positive over the course of a year, with two population groups—gay men and people from sub-Saharan Africa—particularly affected. The HIV/AIDS epidemic is spreading in France, and certain preventive behaviors are on the decline, particularly among gay men but also among young people. How can we reignite commitment to prevention? This issue presents, by population group (young people, the gay community, migrants, sex workers, and prisoners), the prevention strategies currently in place along with their limitations, and, in contrast, community-based initiatives that are, for the most part, innovative.