An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response. In technical terms, an allergen is an antigen that is capable of stimulating a type-I hypersensitivity reaction in atopic individuals through immunoglobulin E (IgE) responses. [ 1 ]

2024年11月9日 · Allergic reactions are symptoms that result from your body creating these antibodies. Allergens can be airborne or can arise from contact with your skin, from medications, or from food. Depending on the type, they may enter your body through your respiratory system, skin, or digestive tract.

2024年8月24日 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom and pet dander. Allergies also can happen due to certain foods and medicines that don't cause reactions in most people.

An allergen is a substance that can cause an allergic reaction. In some people, the immune system recognizes allergens as foreign or dangerous. As a result, the immune system reacts by making a type of antibody called immunoglobulin E (IgE) to defend against the allergen. This reaction leads to allergy symptoms.

Allergen, substance that in some persons induces the hypersensitive state of allergy and stimulates the formation of reaginic antibodies. Allergens may be naturally occurring or of synthetic origin and include pollen, mold spores, dust, lint, animal dander, insect debris, foods, blood serum, and

An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. For instance, if you have an allergy to pollen, your immune system identifies pollen as an invader or allergen.

2024年10月10日 · Allergies arise if the body's immune system overreacts to certain foreign substances (allergens) that are normally harmless in most people. Common allergens include pollens, fungal spores, house-dust mites, and animal epithelial materials but can also include drugs, biologic products, and insect venoms.

2024年4月12日 · An allergy is an immune system response to a substance called an allergen. Common allergens include pollen, mold, insect venom, tree nuts, and latex.

Allergies are your body’s reaction to normally harmless substances. Allergy symptoms range from mild to life-threatening. Treatments include antihistamines, decongestants, nasal steroids, asthma medicines and immunotherapy. Allergies cause your immune system to overreact to certain foreign substances. What are allergies?

2023年11月20日 · Allergies are when your immune system overreacts to something called an allergen. An allergen is a foreign substance that's not harmful to most people, such as pollen or pet dander (skin...