Did you have to get tested because you came in contact with someone who was positive?
I've had multiple coworkers at both my jobs get it but I've managed to dodge it so far. . . Afaik.
Some scaredy person told me the tests don't catch it 30% of the time, like if you got tested too soon after being infected, or for just whatever reason, but I only read that about the instant result tests and antibody tests, I have no idea what the fail rate is on the health dept tests, and I doubt anyone else does either.