Do I have a legal case if I self-quarantined because of close contact with covid and was terminated from my job because of it?

My boss informed me that two of my fellow employees tested positive for Covid and a third was going to get tested. I had close contact with all three people because we are a small shop with a total of ten employees including the owner and her husband (my boss). I stated to my boss that I did not feel safe being there because of the close contacts and lack of disinfecting contaminated surfaces. I informed him that I was going to get tested and self-quarantine and I would return once it was safe for me to do so. When I returned to work I received a letter from my boss that stated my employment was terminated due to me walking off the job and it was their impression that I quit because I stated I did not feel safe there and did not show up for work the following days.The only reason why I did not show up was because I self-quarantined like I am suppose to do. Other employees have done the same and are still employed. I've been there 16 years.