According to the European Centre for Disease Prevention and Control (ECDC), only some EU/EEA countries implement comprehensive prevention programmes for key populations. Two out of three countries report that funds available for prevention are insufficient in terms of what is required to reduce the number of new HIV infections. Specifically, there is a need to improve the targeting, scale and effectiveness of HIV combination prevention programmes for gay men and other men who have sex with men (MSM), among whom there has been a steady increase in the numbers of new infections.