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Allergies occur when the body's immune system overreacts to an allergen—something that usually is harmless, such as plant pollen, dust mites, molds, insect stings or food [1]. Allergy symptoms can include congestion, sneezing, itching and rashes [2]. Treatment for allergies may involve avoiding triggers and taking medications such as antihistamines or corticosteroids [3]. People with a history of allergies to medications taken by mouth or a family history of severe allergic reactions can also get vaccinated [4].

[1]: Allergies - How To Manage and Treat Allergies | ACAAI Patient (
[2]: Allergies: Symptoms, Reaction, Treatment & Management (
[3]: WebMD Allergies Health Center - Find allergy information and latest ... (
[4]: Getting Your COVID-19 Vaccine | CDC (


Allergies are an overreaction of the immune system to a substance that is usually harmless. Common allergens include pollen, dust mites, pet dander, certain foods (such as peanuts and shellfish), insect stings or bites, medications and latex. Symptoms can range from mild itching or sneezing to severe reactions such as difficulty breathing or anaphylaxis. Treatment for allergies may involve avoiding the allergen, taking medication or receiving immunotherapy shots.