Expanded programme on immunization (EPI).
D001210:Asia, Southeastern / Q000453:epidemiology; D002675:Child, Preschool; D006801:Humans; D017589:Immunization Programs / Q000458:organization & administration / Q000706:statistics & numerical data*; D015994:Incidence; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D014944:World Health Organization