This is the ValueSet that contains all the codes in Vaccine - COVID-19 - EU Union Register of Medicinial Products (http://smart.who.int/ddcc/ValueSet/VaccineCovid19EUUnionRegisterValueSet) and Vaccine - COVID-19 - EU Union Register of Medicinial Products (http://smart.who.int/ddcc/ValueSet/VaccineCovid19EUUnionRegisterValueSet). E.g. what you have to deal with if you get resources containing codes in either of them