I might suggest to those with food sensitivites and BD, to not take any food risks when getting the vaccine. After getting my second Pfizer vaccine yesterday, I ate something I am sensitive to today (chocolate w peanut butter) - which I can typically tolerate with just a mild response when I'm feeling well and with the help of my Colchicine meds (2 X .6mg/day). This time - a day after the vaccination, my reaction is much stronger in my mouth as I have a sore, raised rash all over my lips and in my mouth. and I'm hoping it subsides by tomorrow or I'm going to be hurting.
Otherwise, my vaccination response has been very mild, just a sore arm and feeling a little tired and out of it mentally. Good luck, all!
(I'm 50, female w BD showing up as mostly inflammation arthritis and mouth sores that are relatively controlled by Colchicine.)