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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.
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 ...
Around 15% of adults have mild, localized allergic reactions. Systemic reactions occur in 3% of adults and less than 1% of children. [130] Unknown Drug allergies: Anaphylactic reactions to penicillin cause 400 deaths per year. Unknown Food allergies: 7.6% of children and 10.8% of adults. [131]
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 ...
Atopy. Atopy is the tendency to produce an exaggerated immunoglobulin E (IgE) immune response to otherwise harmless substances in the environment. [2] Allergic diseases are clinical manifestations of such inappropriate, atopic responses. [2] Atopy may have a hereditary component, although contact with the allergen or irritant must occur before ...
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 ...
Peanut allergy. Peanut allergy is a type of food allergy to peanuts. It is different from tree nut allergies, because peanuts are legumes and not true nuts. Physical symptoms of allergic reaction can include itchiness, hives, swelling, eczema, sneezing, asthma attack, abdominal pain, drop in blood pressure, diarrhea, and cardiac arrest. [ 1]