title: The problem of immunization in Canada.
mesh_terms: D000293:Adolescent; D002170:Canada; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007114:Immunization; D007115:Immunization Schedule; D007223:Infant; D011367:Professional Staff Committees; D012955:Societies, Medical; D012956:Societies, Nursing