The Expanded Program on Immunization (EPI) was established in 1976 to provide routine childhood immunizations against six diseases: tuberculosis, polio, diphtheria, tetanus, pertussis, and measles. The program aims to reduce child mortality from vaccine-preventable diseases and has specific goals around immunizing children, maintaining polio-free status, eliminating measles, and controlling other diseases. The EPI follows principles of targeting eligible populations, focusing on epidemiology, and providing immunization as a basic health service. It utilizes a cold chain system to store and transport vaccines according to their temperature sensitivities.