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