title: Practical considerations regarding the impact on immunization schedules of the introduction of new combined vaccines.
authors.affiliation: Johns Hopkins University School of Hygiene and Public Health, Baltimore, Maryland 21205, USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Halsey
mesh_terms: D001428:Bacterial Vaccines / Q000008:administration & dosage*; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D006801:Humans; D007223:Infant; D010567:Pertussis Vaccine / Q000008:administration & dosage; D011356:Product Labeling; D017778:Vaccines, Combined / Q000008:administration & dosage*; D014765:Viral Vaccines / Q000008:administration & dosage*
chemical_list: D001428:Bacterial Vaccines; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D010567:Pertussis Vaccine; D017778:Vaccines, Combined; D014765:Viral Vaccines