This is the ValueSet that contains all the codes in Lab Test - Qualitative Result - ICAO (http://smart.who.int/ddcc/ValueSet/LabTestResultIcaoValueSet) and Lab Test - Qualitative Result - ICAO (http://smart.who.int/ddcc/ValueSet/LabTestResultIcaoValueSet). E.g. what you have to deal with if you get resources containing codes in either of them