Are allergies connected to autoimmune disease?

I have an autoimmune disease, I also have always had seasonal allergies for as long as I can remember. According to my allergists, I have been allergic to grass & corn in my twenties, but now am allergic to grass, trees, and several food items such as wheat and walnuts, but no longer corn. I’ve been on immunosuppressive therapies for at least 12 years, but not at times of allergy testing. Is there a link between my immune disease and the changing food allergies?

Yes, allergic asthma has an auto-immune factor. If grasses and pollens make you sick, then you are prone to viruses.