title: Food and Drug Administration approval of a second diphtheria and tetanus toxoids and acellular pertussis vaccine.
mesh_terms: D002648:Child; D002675:Child, Preschool; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D014481:United States; D014486:United States Food and Drug Administration; D014614:Vaccines, Synthetic
chemical_list: D015721:Diphtheria-Tetanus-Pertussis Vaccine; D014614:Vaccines, Synthetic