Requiring COVID vaccination in owner-occupied building

[Suzanne Lord]

Let's say the owner of a multifamily, owner-occupied building is immuno-compromised. When listing for new tenants, would it be legitimate -- and would it be wise -- to require proof of full COVID vaccination? Would it make sense even to list that preference will be given to fully vaccinated applicants? What would be the upsides and downsides of doing so?