This is the ValueSet that contains all the codes in Lab Test - Pathogen - COVID-19 - SNOMED CT (http://smart.who.int/ddcc/ValueSet/LabTestPathogenCovid19SnomedValueSet) and Lab Test - Pathogen - COVID-19 - SNOMED CT (http://smart.who.int/ddcc/ValueSet/LabTestPathogenCovid19SnomedValueSet). E.g. what you have to deal with if you get resources containing codes in either of them