The document discusses immunization and vaccination. It defines immunization as making a person immune or resistant to an infectious disease, typically through vaccine administration. There are different types of immunization including active and passive forms, as well as different vaccine types such as live attenuated, inactivated, and toxoid. Benefits of immunization include preventing deadly diseases and saving costs. The Extended Program on Immunization aims to make vaccines available worldwide. The document also provides data on immunization coverage in Nepal and discusses challenges and solutions to improving immunization programs.