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1 in 8 have allergic rhinitis. 3-6% are affected by food allergy. Children in the United States under 18 years of age: [3] Percent with any allergy: 27.2%. Percent with seasonal allergy: 18.9%. Percent with eczema: 10.8%. Percent with food allergy: 5.8%. Children in the United Kingdom: [2] 1 in 6 with eczema.
Food allergies: 7.6% of children and 10.8% of adults. [131] Peanut and/or tree nut (e.g. walnut) allergy affects about three million Americans, or 1.1% of the population. [129] 5–7% of infants and 1–2% of adults. A 117.3% increase in peanut allergies was observed from 2001 to 2005, an estimated 25,700 people in England are affected.
Asthma is a long-term inflammatory disease of the airways of the lungs. [4] It is characterized by variable and recurring symptoms, reversible airflow obstruction, and easily triggered bronchospasms. [9] [10] Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. [3]
Anaphylaxis (Greek: ana- ‘against’ + phylaxis ‘guarding’) is a serious, potentially fatal allergic reaction and medical emergency that is rapid in onset and requires immediate medical attention regardless of the use of emergency medication on site. [4] [5] It typically causes more than one of the following: an itchy rash, throat closing ...
Allergen. An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies . In technical terms, an allergen is an antigen that is capable of stimulating a type-I hypersensitivity ...
Frequency. ~6% (developed world) [ 1][ 2] A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of ...
Allergic rhinitis, of which the seasonal type is called hay fever, is a type of inflammation in the nose that occurs when the immune system overreacts to allergens in the air. [ 6] Signs and symptoms include a runny or stuffy nose, sneezing, red, itchy, and watery eyes, and swelling around the eyes. [ 1] The fluid from the nose is usually clear ...
Allergic response. Dermatographic urticaria. An allergic response is a hypersensitive immune reaction to a substance that normally is harmless or would not cause an immune response in everyone. An allergic response may cause harmful symptoms such as itching or inflammation or tissue injury.