The pre vs post-coordination: No, we haven’t. We need to. We need to define whether we allow positive tests as a pre-coordinated thing. We have that with the Corona test very acutely. The problem if we say yes is that we need to pre-coordinate a large amount of combinations, leading to permutational explosion. If we decide the other way we have to split up concepts like that. Which is work. So, so far we have done very little. But it is about time.
Your situation is actually worse. Because it is a triple: allergy test - positive - dander. Same is with microbiology: organism - antibiotic susceptibility - positive.
How do you handle this?