There are no preservatives in the vax. There is a type of lipid aka oil/fat in the shot. I'm guessing that the issue. The lady that worked 30 years developing the mRNA product for Moderna was the person who figured out how to keep the body from rejecting/attacking the mRNA. So if the people aren't allergic to the fat then it makes me wonder if the body is reacting to the mRNA? My buddy called SG Jerome Adams the other day and he said they are safe and that he and VP Mike Pence were taking the shots on TV.