Immunization is an attempt to create or increase a person's active immunity against a disease, so that if one day exposed to the disease will not get sick or experience only mild illness. Immunization is done by providing a specific vaccine to a to provide protection against certain diseases as well.

The vaccine is an antigen such as microorganisms already dead, is still alive but has been weakened, intact or parts thereof, which have been processed, the form of the toxin microorganisms that have been processed into toxoid, recombinant protein when administered to a person would pose a specific immune active against certain infectious diseases ,

A primary immunization immunization activities by providing a number of specific vaccines to particular timing of the baby before the baby reaches the age of 12 months. Completeness and timeliness of immunization is very important to ensure effective protection against diseases that can be prevented by immunization.

The immunization program aims to reduce morbidity and mortality due to diseases that can be prevented by immunization. Such diseases are tuberculosis (TB), hepatitis B (jaundice), poliomyelitis (lame wilt), diphtheria, pertussis (whooping cough), tetanus, and measles (measles).

Basic immunization consists of one dose of Hepatitis B (Immunization Hepatitis B0), 1 dose of BCG (BCG immunization), three doses of DPT-HB-Hib (immunization of DPT-HB-Hib), 4 doses of Polio drops (Immunization Polio), and 1 dose measles (measles) should be administered to infants aged 0 -11 months.