The CEEISCAT Centre for Epidemiological Studies of Sexually Transmitted Disease and AIDS in Catalonia is a structural service of the Catalan Institute of Oncology (ICO). CEEISCAT acts as a reference body for the epidemiological surveillance and monitoring of HIV, STIs and viral hepatitis. The research activity is managed by the Germans Trias i Pujol Research Institute (IGTP), a public research centre dedicated to increasing scientific knowledge and transferring it to improve the care and lives of patients. CEEISCAT, jointly with AIDS Action Europe, is coordinating the COBATEST Network, a European network of community-based services offering testing for HIV and other STIs, and it's in charge of the monitoring and evaluation of testing activity in the network.