I have many coworkers having allergy troubles, all got the vaccine. They have all also been talking about heart palpitations, getting the shivers, shakes, or sweats, but this of course is all circumstantial stuff. Sometimes they talk about it starting since the vaccine, sometimes they blame it on other major stresses in their life which are real and happening all at the same time. idk. I didn't get it, but I don't have allergies anyway so I can't compare anything personally.