What if I told you I'm going to let my friend get quarantined at my job?
I'm shocked with your actions. Are you doing it as a favor to your friend?
There's more to it than you think.
If you're worried about your friend that's fine. But don't get them quarantined if it's unnecessary.
I have a plan and they don't know it.
This sounds like a form of betrayal and not sure what you are doing. If this is a friend then how are you justifying it to yourself? Be realistic and stop trying to do something to damage a friendship over nothing.