COVID 19 General Comorbidities Present

Working from LogicaHealth IG

https://covid-19-ig.logicahealth.org/StructureDefinition-COVID-19-underlying-medical-condition-presesnt.html

26 May discussion on extensibility see http://hl7.org/fhir/R4/extensibility.html#isModifier

See analysis spreadsheet by @Former user (Deleted)