This is the ValueSet that contains all the codes in Vaccine - COVID-19 - CVX (http://smart.who.int/ddcc/ValueSet/VaccineCovid19CvxValueSet) and Vaccine - COVID-19 - CVX (http://smart.who.int/ddcc/ValueSet/VaccineCovid19CvxValueSet). E.g. what you have to deal with if you get resources containing codes in either of them