This value set includes codes based on the following rules:

• Include these codes as defined in http://hl7.org/fhir/sid/cvx version 20200722

  Code	Display
  28	diphtheria and tetanus toxoids, adsorbed for pediatric use
  20	diphtheria, tetanus toxoids and acellular pertussis vaccine
  01	DTP Whole Cell
  22	DTP-Haemophilus influenzae type b conjugate vaccine
  47	Haemophilus influenzae type b vaccine, HbOC conjugate
  46	Haemophilus influenzae type b vaccine, PRP-D conjugate
  49	Haemophilus influenzae type b vaccine, PRP-OMP conjugate
  48	Haemophilus influenzae type b vaccine, PRP-T conjugate

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  OTH	other
  UNK	unknown