We are experts and pioneers in the response to HIV/AIDS. We tirelessly seek new solutions and invest in pioneering scientific research. We mobilise politicians and Dutch society, and develop state-of-the-art interventions. Aidsfonds aims to show that what we do works. We invest in promising innovative projects and methods and share what we have learned with a broader audience by publishing reports, manuals, factsheets on the work we do and the facts we discover. Through the development of useful data tools to share ‘big data’ on the epidemic we facilitate data-informed programming in combating the epidemic. More and more data on the response to STIs is available to help us respond in a more effective way, reaching target groups with information that matches their needs. By combining epidemiological data with other information, we can have a better idea of who needs testing and where to deliver it, in order to have the greatest impact.