Anyone who is allergic to the ingredients should not get the vaccine. Also, if you have an allergic reaction to the first does of the vaccine, you should not get a second dose.
Pfizer COVID-19 Ingredients
The Pfizer-BioNTech COVID-19 Vaccine includes the following ingredients: mRNA, lipids ((4-hydroxybutyl)azanediyl)bis(hexane-6,1-diyl)bis(2-hexyldecanoate), 2 [(polyethylene glycol)-2000]-N,N-ditetradecylacetamide, 1,2-Distearoyl-sn-glycero-3- phosphocholine, and cholesterol), potassium chloride, monobasic potassium phosphate, sodium chloride, dibasic sodium phosphate dihydrate, and sucrose. Food and environmental allergies will not prevent you from getting the Pfizer vaccine.
FDA Fact Sheet for Recipients and Caregivers – Pfizer
Moderna COVID-19 Ingredients
Each dose of the Moderna COVID-19 Vaccine contains 100 mcg of nucleosidemodified messenger RNA (mRNA), a total lipid content of 1.93 mg (SM-102, polyethylene glycol [PEG] 2000 dimyristoyl glycerol [DMG], cholesterol, and 1,2-distearoyl-sn-glycero-3-phosphocholine [DSPC]), 0.31 mg tromethamine, 1.18 mg tromethamine hydrochloride, 0.043 mg acetic acid, 0.12 mg sodium acetate, and 43.5 mg sucrose.
FDA Fact Sheet for Recipients and Caregivers – Moderna