The document discusses the concept of primary health care (PHC). It defines PHC as essential care based on scientifically sound and socially acceptable methods that is universally accessible to communities through their participation and at a cost they can afford. The key elements of PHC include education on health problems, nutrition, water and sanitation, maternal and child health services, immunizations, treatment of common diseases and injuries, and essential drugs. Factors that contributed to the development of PHC in Tanzania include policies of self-reliance and rural development as well as diseases being largely preventable. The document outlines indicators for evaluating PHC programs and provides the current status of some PHC indicators in Tanzania based on DHS data from 2010.