An allergy occurs when an individual's immune system misclassifies typically harmless substances as harmful and has a specific and reproducible immune response (1,2). The severity of allergy symptoms can range from itchy, watery eyes and hives to life-threatening anaphylaxis, and the presence of allergies can negatively impact an individual's quality of life (3-6). This report uses 2021 National Health Interview Survey (NHIS) data to describe the prevalence of seasonal allergies, eczema, and food allergies in adults in the United States.
All material appearing in this report is in the public domain and may be reproduced or copied without permission; citation as to source, however, is appreciated.