This code system http://hl7.org/fhir/detectedissue-status defines the following codes:

CodeDisplayDefinition
mitigated MitigatedIndicates the detected issue has been mitigated
<status value="active"/><experimental value="false"/><date value="2021-01-05T10:01:24+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="Indicates the status of the detected issue. This code system contains only status codes that are not already defined and used from the ObservationStatus code system."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><content value="complete"/><concept><code value="mitigated"/><display value="Mitigated"/><definition value="Indicates the detected issue has been mitigated"/></concept></CodeSystem>