Allergies and Vaccinations: Common Food Allergens Found in Vaccines


Millions of routine childhood vaccinations are given every year and allergic reactions from vaccines are rare. However, people with food allergies may be at higher risk for allergic reactions as a result of vaccines containing food proteins.

I researched vaccines before vaccinating my one year-old with multiple food allergies and found the following allergens in some common, and some not so common, vaccines.

Egg Protein

Influenza, typhoid, and yellow fever vaccines are produced in eggs causing egg proteins to be present in the final product which can cause an allergic reaction. The American College of Allergy, Asthma and Immunology states that 1.6 percent of children have an allergy to egg protein and therefore might not be able to receive the vaccine.

Measles and mumps vaccines, including the MMR vaccine, are made in chick embryo cells in culture, not in eggs. The much smaller amount of remaining egg proteins found in the MMR (measles, mumps, rubella) vaccine does not usually cause a reaction in egg allergic children.

If your child has a severe egg allergy and you are concerned about an allergic reaction to the MMR vaccine, your allergist can test for an MMR allergy and if positive, administer the vaccination in multiple small doses over an extended period of time.


Some vaccines contain gelatin to protect them against freeze-drying or heat. People with severe allergies to gelatin should avoid getting gelatin-containing vaccines.

Routine childhood vaccines containing gelatin include MMR, varicella (chicken-pox), influenza, and DTaP (diphtheria, tetanus and acellular pertussis).

Non-routine vaccines containing gelatin include yellow fever, rabies, and Japanese encephalitis. Allergic reactions to the MMR vaccine are far more likely due to the gelatin in the vaccine rather than to residual egg proteins in the vaccine.

Bovine (Beef) Gelatin

Gelatin is created by prolonged boiling of animal skin, connective tissue or bones, usually of bovine or porcine origin, and is one of many types of stabilizers added to vaccines. Vaccines with gelatin may contain bovine gelatin.

If your child has a history of food allergies, discuss with your allergist whether or not he or she should be vaccinated, and whether or not the vaccines should be administered in your pediatricians office or your allergists office.

Disclaimer: This is the list of food allergens I found in vaccines while doing research before vaccinating my one year-old with multiple food allergies. This list may not be complete and may not be up-to-date with current vaccines as vaccines change from year to year, and I urge all parents to be proactive in communicating their concerns regarding food allergies and vaccines with their health care providers prior to vaccinating children with food allergies.

What food allergies does your kid have? How have you managed food allergies and vaccines for your children?

Photo courtesy of Flickr.


Stacy enjoys expressing her creativity creating handmade cards, sharing her experiences raising multiples with other mothers of multiples, and helping families of children with food allergies learn to manage their allergies through education and support. Learn more about Stacy on her blog

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Stacy is a wife, mother of three boys, school volunteer, card maker, mom blogger and writer. Stacy and her husband Ken have been happily married for nine years and have three boys; Kaden & Logan (twins) age 5 and Colton age 1 year. In 2011, her youngest son was diagnosed with food allergies (at 7 months old) after suffering for months with severe dermatitis. Learn more about Stacy and her life as a wife, mother of multiples and her journey learning to cook for here food allergy baby on her blog:


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