title: Expanded programme on immunization (EPI). Surveillance of EPI target diseases.
mesh_terms: D004165:Diphtheria / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D017589:Immunization Programs; D008457:Measles / Q000453:epidemiology / Q000517:prevention & control*; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*