You really haven't supplied much information, but I'll try to help a little. I suggest you Google "Sick Day Rules for Adrenal Insufficiency". It's from the UK's NHS, Dept of Endocrinology. Generally speaking, if you are on long term steroids, your adrenal glands are not working - unless you are almost to the very end, and maybe they are starting back up again. But even if that's the case, they are probably not working well enough to handle extra stress to your body from illness. Usually, the doctors will advise upping your steroid to help you get through your illness. Don't know what your doctor is thinking. Might be something going on there that I don't know about. When I had Covid in May of last year, I was on 6 mg of Pred. I had a mild case of covid, but the doctor wanted to take me off of pred and put me on some other steroid. I bargained with her, and we just upped my prednisone by 5 mg. for about a week and a half, and then I was feeling really well, and I went back down to my usual 6mg in 2 steps - very quickly. Maybe your doctor just means the Methotrexate??? I'm pretty sure it's recommended to get off the Methotrexate for a short while prior to the covid vaccination. You need to check with your doctor again or perhaps your primary care doctor?