I am brand new to this and don't know any fancy terminology to do with courts and laws, etc. I am wondering what can be done to a business that refuses to let me shop because I am not wearing a mask? They tell me that its mandatory and I tell them that I have a medical condition prohibiting me from wearing one. I haven't been able to shop there during covid. Can I do anything about this? thank you

well you can start by asking them if they allow exemptions to the handicap ,pererable record them. usually they are so fed up they say no
thats a lawsuit

ask them if the mask will stop the virus. try get them to give you medical advice without a licence. and make false claims

follow up are to sue them for violations of the nuremberg code
they cannot force or coerce medical procedures on you.
mask when associated with covid are medical devices

if its a private and they ask you to leave i advise doing so