It was definitely annoying to do more work than needed.

Sounds like that was the problem from the get go.

I want to mention that I don't know what precautions clinicians follow to mitigate that sort of mistake on the lab's end.

Sounds like another problem from the get go.

The only physician I'm worried about is our medical director

Sounds like another problem from the get go

To remedy the blunder, every staff in the department will receive retraining.

Sounds like some people shouldn't have been hired in the first place.

If it wasn't for the fact people could die over shit like this I'd be saying thank god this isn't a criminal forensic's lab.