i understand things are very politicized now, so to be clear, genuine interest. i thought there was some relation just based on how regular vaccines operate.
Honestly, I don't know, but it's interesting that when I say I had very bad side effects to the vaccine, some people are convinced that it is because I would also react to covid similarly.
Will those people say to a 70 years old obese smoker who didn't get any reaction after the vaccine? I know many like that. Should I tell them "oh you didn't get a severe reaction to the vaccine, so I guess that's how you would react to covid, too"? Of course not, it's nonsense.
Regarding correlations between the two, it's a bit difficult to tell. After all, you can't really get a correlation between the intensity of vaccine reaction and actual virus exposure for... obvious reasons.
However, (I'm a bit rusty on my allergy and autoimmunity, so if someone catches a mistake, please call me out on it) allergic reactions and the viral reactions tend to present themselves differently. The common image of swelling and inability to breathe are almost completely associated with allergy, while the fever, tiredness and so on tend to be more standard.