Sinus issues and work

As I mentioned last year in another thread last year, I have had issues with allergies and other sinus problems. A runny nose, congestion, sneezing and coughing are just a part of my life and they probably always will be.

Again, I am not looking for medical advice. I have sought medical attention and I’m following their directions.

For the last week, I’ve dealt with a lingering cough and my coworkers are concerned. My supervisor is also concerned.

Two days ago, I left work early and went to an urgent care center. The tests for Covid and flu were negative. I received a prescription for a medicine that had worked for me in the past.

The doctor gave me note saying that I had tested negative for Covid and the flu and that I was not a risk to spread anything to anyone. I could, however, wear a mask as a courtesy to my colleagues.

The next day I gave the note to my supervisor and he said I needed to work from home as long as I had the cough. Knowing me, that could be a while.

I also usually prefer not to work from home. I spent my first four months on this job working at home and it really set me back. Being new to the job then it wasn’t a good learning situation.
I’m still not crazy about it because of that experience.

I repeated that the doctor had certified that I was ok to return to the office and he disagreed saying “It’s the perception that matters.”

Can a supervisor disregard a doctor’s note like that?

Could the doctor have been wrong and should I get retested?