This is the ValueSet that contains all the codes in Positive Event Status (http://hl7.org/fhir/us/qicore/ValueSet/qicore-positive-event-status) and Positive Event Status (http://hl7.org/fhir/us/qicore/ValueSet/qicore-positive-event-status). E.g. what you have to deal with if you get resources containing codes in either of them