Concerns about allergic reactions to COVID-19 vaccines are understandable, especially for people who have experienced reactions to medications or previous vaccinations. Although severe allergic reactions are rare, recognizing the symptoms and understanding when an allergy evaluation may be appropriate can help patients make informed decisions.
COVID-19 vaccine allergy testing is not routinely recommended. However, individuals with a history of suspected vaccine allergies may benefit from consulting an allergist to assess their risk and discuss appropriate vaccination options.
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Key Takeaways
- Allergic reactions to COVID-19 vaccines are rare but possible. Individuals with a history of allergies may consult an allergist before vaccination.
- Symptoms of an allergy include hives, difficulty breathing, and swelling. Severe reactions require immediate medical attention.
- Vaccine ingredients like polyethylene glycol (PEG) and polysorbate 80 may trigger allergic reactions. Previous reactions are relevant for evaluation.
- Routine allergy testing before vaccination isn’t recommended; evaluations depend on medical history.
- Professional guidance can help assess risks and determine appropriate vaccination options for individuals with allergic reactions.
Table of contents
- Can You Be Allergic to the COVID-19 Vaccine?
- What Are the Symptoms of a COVID-19 Vaccine Allergy?
- What Ingredients Can Cause COVID-19 Vaccine Allergies?
- Previous Allergic Reactions
- Vaccine Ingredient Assessment
- Allergy Testing Recommendations
- Who Should See an Allergist Before COVID-19 Vaccination?
- Can You Receive Another COVID-19 Vaccine After an Allergic Reaction?
- Frequently Asked Questions About COVID-19 Vaccine Allergies
- Get Professional Guidance on COVID-19 Vaccine Allergies
Can You Be Allergic to the COVID-19 Vaccine?
Yes, allergic reactions to COVID-19 vaccines are possible, although severe reactions are uncommon. According to the Centers for Disease Control and Prevention (CDC), anaphylaxis has been reported at an estimated rate of about five cases per million mRNA COVID-19 vaccine doses administered.
Resource: cdc.gov
Anaphylaxis is a serious allergic reaction that can affect breathing, blood pressure, and other body functions. It requires immediate medical attention.
Some symptoms after vaccination may resemble an allergic reaction but can also be caused by anxiety-related responses, fainting, or expected vaccine side effects.
What Are the Symptoms of a COVID-19 Vaccine Allergy?
Allergic reactions may develop shortly after vaccination, but symptoms can vary in timing and severity.
Possible signs include:
- Hives, itching, or widespread skin redness
- Swelling of the lips, tongue, face, or throat
- Wheezing or difficulty breathing
- Dizziness, weakness, or fainting
- A sudden drop in blood pressure
- Persistent vomiting or abdominal symptoms alongside other allergic symptoms
Persistent vomiting or abdominal symptoms alongside other allergic symptoms
Difficulty breathing, throat swelling, collapse, or other signs of anaphylaxis require immediate emergency medical attention. Call 911 if you suspect a severe allergic reaction.
Common vaccine side effects, such as soreness, fatigue, headache, and temporary fever, do not necessarily indicate an allergy.
What Ingredients Can Cause COVID-19 Vaccine Allergies?
Certain vaccine ingredients may trigger allergic reactions in susceptible individuals.
Polyethylene Glycol (PEG)
Polyethylene glycol, commonly called PEG, is an ingredient in mRNA COVID-19 vaccines, including Pfizer-BioNTech and Moderna.
PEG and polysorbate are structurally similar, so a history of suspected reactions to these substances is relevant during an allergy evaluation.
Polysorbate 80
Polysorbate 80 is used in certain vaccines and medications, including the Novavax COVID-19 vaccine.
PEG and polysorbate are structurally similar, so a history of suspected reactions to these substances is relevant during an allergy evaluation.
A suspected ingredient allergy does not automatically mean someone will react to a COVID-19 vaccine.
How Are COVID-19 Vaccine Allergies Evaluated?
A COVID-19 vaccine allergy evaluation usually begins with a detailed medical history rather than routine skin testing.
During the evaluation, an allergist may review your history of allergic reactions, assess potential allergies to vaccine ingredients, and determine whether further testing is needed.
Previous Allergic Reactions
Your allergist may ask about reactions to vaccines, injectable medications, or specific ingredients.
Important information includes:
- The vaccine or medication involved
- How soon symptoms appeared
- The type and severity of symptoms
- Whether emergency treatment was required
- Any previous diagnosis of anaphylaxis
Medical records documenting previous allergic reactions may help the allergist understand what happened and assess whether further investigation is needed.
Vaccine Ingredient Assessment
An allergist may review the ingredients in a vaccine associated with a previous reaction to identify potential concerns.
Reviewing these ingredients can help the allergist assess whether an alternative COVID-19 vaccine type may be appropriate.
Allergy Testing Recommendations
Routine skin testing with COVID-19 vaccines or their ingredients is generally not recommended because these tests do not reliably predict future allergic reactions.
Further investigation may be appropriate in selected cases, depending on the patient’s medical history and clinical findings.
Who Should See an Allergist Before COVID-19 Vaccination?
Most people with common allergies can receive COVID-19 vaccines without a specialist assessment.
However, an allergy consultation may be appropriate for individuals who have:
- Experienced an immediate allergic reaction after a previous COVID-19 vaccine dose
- Had anaphylaxis following vaccination
- Been diagnosed with an allergy to a vaccine ingredient
- Experienced a severe reaction to another vaccine or injectable medication
- An unclear allergy history that may affect vaccine selection
Food allergies, seasonal allergies, and environmental allergies generally do not prevent someone from receiving a COVID-19 vaccine.
Can You Receive Another COVID-19 Vaccine After an Allergic Reaction?
Some patients may still be eligible for another COVID-19 vaccine after an allergic reaction.
The right approach depends on the reaction’s severity, the vaccine involved, and the patient’s medical history.
According to the CDC, individuals who experience a severe allergic reaction to a previous dose of a COVID-19 vaccine or one of its components should not receive another dose of the same vaccine type. An alternative vaccine type may be appropriate following an allergy assessment.
For certain patients, specialist assessment may make vaccination under medical supervision appropriate.
Frequently Asked Questions About COVID-19 Vaccine Allergies
Is COVID-19 Vaccine Allergy Testing Necessary?
Routine allergy testing is not recommended before vaccination. Testing decisions depend on individual clinical circumstances.
Can I Get Vaccinated With Food Allergies?
Yes. Food allergies alone are not considered a contraindication to COVID-19 vaccination.
Is a Rash After Vaccination an Allergy?
Not always. Some rashes are delayed immune responses, not immediate allergic reactions. A healthcare professional can assess the cause.
Can an Allergist Confirm a Vaccine Allergy?
An allergist can assess whether symptoms suggest an allergic reaction, although no single routine test reliably confirms or excludes all COVID-19 vaccine allergies.
Get Professional Guidance on COVID-19 Vaccine Allergies
If you suspect an allergic reaction to a COVID-19 vaccine or have concerns about your allergy history, a professional evaluation can help you understand your vaccination options.
Asthma & Allergy Associates, P.C. provides allergy care and guidance to patients with suspected allergic reactions. Contact us to schedule an appointment to discuss your concerns and determine whether an allergy evaluation is appropriate.