Definition : A mandatory set of vaccinations according to the epidemiology within a certain region including nations
(Korea includes BCG, Hepatitis Type B, Diphtheria, Tetanus, Measles, Rubella, Mumps, Polio, and Japanese Encephalitis)

Definition : A set of vaccinations for young patients with high risk of serious infection and for people who are exposed to infectious environment.  
(Varicella, Haemophilius Influenza Type B, Streptococcus pneumonia, influenza, et cetera)

Definition : Vaccinations against predicted epidemics (typhoid, cholera, et cetera)

In addition, basic vaccinations can be defined as all first-time vaccinations that provide fast and effective immunity, and additional vaccinations can be defined as re-vaccination after a certain period of time that maintains the immunity long-term.