These Guidelines are developed by the European AIDS Clinical Society (EACS), a not-for-profit organization, whose mission is to promote excellence in standards of care, research and education in HIV-infection and related co-infections, and to actively engage in the formulation of public health policy, with the aim of reducing HIV disease burden across Europe. The EACS Guidelines provide guidance for healthcare professionals on: assessment of HIV-positive persons, antiretroviral therapy (ART), p