Mass immunization campaigns--the successful and continuing approach.
D002675:Child, Preschool; D006801:Humans; D007114:Immunization; D007883:Legislation, Medical; D008458:Measles Vaccine / Q000008:administration & dosage; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage; D012411:Rubella Vaccine / Q000008:administration & dosage; D014903:West Virginia
D008458:Measles Vaccine; D011054:Poliovirus Vaccine, Inactivated; D012411:Rubella Vaccine