title: October is Immunization Action Month.
mesh_terms: D000293:Adolescent; D002641:Chicago; D002648:Child; D002675:Child, Preschool; D003140:Communicable Disease Control; D006801:Humans; D007087:Illinois; D007114:Immunization; D007223:Infant; D008457:Measles / Q000517:prevention & control