The document discusses primary health care (PHC) as outlined at the International Conference on Primary Health Care in 1978 in Alma-Ata. It established the goal of "Health for All" by 2000 and recognized PHC as the key to achieving this. The conference's Declaration of Alma-Ata defined PHC as essential care that is universally accessible, affordable, and participatory. It outlined six principles of PHC - equity, accessibility, acceptability, community participation, appropriate technology, and multi-sectoral collaboration. The document then provides details on each of these principles and how they are implemented in PHC systems.