When we complete the death certificate, we need to complete immediate cause, subacute cause, and chronic factors.
In Cain’s case, immediate would likely be respiratory failure or cardiac arrest. Subacute would be COVID, and chronic would be based on his colon cancer status.
A guy that survived stage 4 colon ca would likely get yearly Cea cancer marker test, so if the marker was undetectable at the last measure, doctors likely would diagnose as colon ca in remission on annual basis. So then it wouldn’t even make it to his death certificate.
If CEA elevated, likely would have been getting multiple imaging and active treatment and family would have known the cancer came back prior to the Tulsa rally.