I don't think it was an allergy, usually an allergy has a fast reaction and happens within 15m, I usually get an immune response though which is more similar to

I don't think it was an allergy, usually an allergy has a fast reaction and happens within 15m, I usually get an immune response though which is more similar to what happened with second shots of the mrna vax for covid. I get a high fever for 3 days and that's that. But the last time I had the shot was after I bludgeoned my foot with a rusty shovel that was about 4 years ago and I had no immune response this time which is more akin to what happens when I get a flu shot.