Anaphylaxis

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For individuals who are allergic to gelatin or egg protein, getting immunized with certain vaccines can carry the risk of anaphylaxis. Anaphylaxis is a severe allergic (or “hypersensitivity”) reaction; and, while it is rare overall, it presents a significant concern for individuals who have these allergies. As a result, prior to getting vaccinated, individuals who have gelatin or egg protein allergies should consult with their physicians to determine whether it is safe to do so.

Which Vaccines Contain Gelatin?

Gelatin is used as a preservative in various vaccine formulations. For example, gelatin may be present in vaccines including (but not limited to) those used to prevent:

• Diphtheria, tetanus and pertussis (DTaP)

• Influenza (nasal spray formulations)

• Measles, mumps and rubella (MMR) and the separate vaccinations for each of these diseases

• Rabies

• Singles

• Varicella (chickenpox)

Which Vaccines Contain Egg Protein?

Egg protein is used in the production of certain vaccines.

The measles, mumps and rubella (MMR) vaccine is one of the standard childhood vaccinations recommended by the U.S. Centers for Disease Control and Prevention (CDC). The CDC also recommends MMR vaccination for adults who have not previously been vaccinated. Like all CDC-recommended vaccines, the MMR vaccine is generally safe for most people.

When getting vaccinated, it is important to be aware of both the side effects of the particular vaccine as well as the signs of related vaccine illnesses and injuries. As the Centers for Disease Control and Prevention (CDC) explain, “Usually vaccine side effects are minor .

Having an allergic reaction to a vaccine can potentially lead to serious consequences. A severe allergic reaction is known as anaphylaxis, and the effects of anaphylaxis can range from swelling and hives to anaphylactic shock.

So, how can you find out if you are allergic to a vaccine?

Consult with Your Doctor

As with all medical questions, if you would like to find out if you are allergic to a vaccine, you should consult with your doctor. Your doctor can review your medical history, order any necessary tests and determine if you are at risk of having a severe allergic reaction to a particular vaccine.

Review the Vaccine’s List of Ingredients

When someone says that he or she is allergic to a vaccine, what that person really means is that he or she is allergic to a particular vaccine ingredient.