This document discusses different levels of healthcare and defines primary healthcare. It outlines that primary healthcare is the first level of contact between individuals and the healthcare system, and aims to address most common health problems with some assistance from health workers. Secondary healthcare handles more complex issues at district hospitals, and tertiary healthcare provides specialized services at state/regional institutions. The document then details the principles, concepts, and elements of primary healthcare, such as equitable distribution of services, community participation, and treatment of common diseases and injuries.