This is the ValueSet that contains all the codes in IMMZ.Z.DE33 ValueSet for Tetanus and diphtheria-containing vaccines (DT) (http://smart.who.int/immunizations/ValueSet/IMMZ.Z.DE33) and IMMZ.Z.DE33 ValueSet for Tetanus and diphtheria-containing vaccines (DT) (http://smart.who.int/immunizations/ValueSet/IMMZ.Z.DE33). E.g. what you have to deal with if you get resources containing codes in either of them