The Introduction outlines this issue's special Forum on equity in access to health care, including three Articles and a Postscript. The Forum represents a continuation of the debates raised during a seminar organized by the Oswaldo Cruz Foundation in the city of Rio de Janeiro, Brazil, in 2006, in collaboration with UNICEF, UNDP, World Bank, the WHO Special Program for Research and Training in Tropical Diseases, and the United Nations Research Institute for Social Development. The authors approach health care access and equity from a comprehensive and contemporaneous perspective, introducing a new conceptual framework for access, in which information plays a central role. Trust is proposed as an important value for an equitable health care system. Unethical practices by health administrators and health care professionals are highlighted as hidden critical aspects of inequities in health care. As a whole, the articles represent a renewed contribution for understating inequalities in access, and for building socially just health care systems.