@William Hart - @rahul1 knows all about how to model the lab data, tag it with ontologies etc. I'd also peek through here as well https://github.com/medplum/medplum/blob/86bfdc2435035478d5672daf9cd45a609a012119/packages/react/src/stories/covid19.ts - once I have merged the Lab overview I'll share it as well.