The hot, swollen painful arm is due to the immediate or innate immune response most likely due to the polyethylene glycol or the specific lipids enveloping the mRNA.. No relationship with the immediate response and the long term or adaptive immune response as to how strong of a adaptive response you'll make in a couple of weeks.
You should probably not have any more mRNA shots due to your strong immediate response.
This information is for entertainment purposes only. It may very well be worth what it cost you. Talk to your doctor before making any health related decisions.
I am not responsible for anything other than owning near 7 digits of CYDY stock which will turn out to be a very good thing. Cinch.