This document discusses primary health care and the health care system in Pakistan. It defines health and outlines the levels of health care, including primary, secondary, and tertiary. Primary health care focuses on essential care provided through basic health units and rural health centers. The principles of primary health care are equitable distribution, community participation, intersectoral coordination, and appropriate technology with an emphasis on prevention. The health care system in Pakistan aims to provide integrated care through a network of basic health units, rural health centers, tehsil hospitals, and district headquarters hospitals.