This is the ValueSet that contains all the codes in Basic Immunization Codes (http://fhir.ch/ig/ch-vacd/ValueSet/ch-vacd-basic-immunization-vs) and Basic Immunization Codes (http://fhir.ch/ig/ch-vacd/ValueSet/ch-vacd-basic-immunization-vs). E.g. what you have to deal with if you get resources containing codes in either of them