<status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="A public health case is a Concern about an observation or event that has a specific significance for public health. The creation of a PublicHealthCase initiates the tracking of the object of concern. The decision to track is related to but somewhat independent of the underlying event or observation."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ActClass"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="HCASE"/> </filter> </include> </compose> </ValueSet>