This document outlines the key aspects of primary health care according to the WHO and the Declaration of Alma-Ata. It discusses the eight essential elements of primary health care, including health education, treatment of endemic diseases, immunization, and maternal/child health. The four pillars of primary health care are also defined as active community participation, inter-sectoral linkages, appropriate technology use, and support mechanisms. Primary health care aims to be accessible and affordable while addressing the major health problems in a community through promotion, prevention, treatment, and rehabilitation services.