When the HIV epidemic officially hit western Europe in the early 1980s, central and eastern Europe were almost completely spared due to the isolation of the Soviet Union. However, in the mid-1990s, reported new cases of HIV in eastern European countries began to increase exponentially. While there have been many declarations and strategies addressing HIV/AIDS, today the goal is universal access to HIV/AIDS prevention, treatment, care and support services by 2010. The articles included in this thematic issue of the Central European Journal of Public Health on HIV/AIDS reflect this, while the ten priorities listed below are immediate and sometimes innovative research needs in the context of preventing HIV among the most-at-risk populations. While by no means exhaustive, they are intended to point out gaps in existing knowledge and thus serve as inspiration for future research efforts.