Description

An IgE test measures the level of immunoglobulin E antibodies in the blood, which is primarily used to diagnose allergies by identifying if someone's body is overreacting to specific allergens like pollen, dust mites, food, or insect venom, causing symptoms like sneezing, itchy eyes, or hives; essentially, a high IgE level indicates a potential allergic reaction to a specific allergen.

When discussing "IgE qualification" in the context of biologics, it refers to the requirement for a patient to have elevated levels of immunoglobulin E (IgE) in their blood in order to be eligible for treatment with certain biologic medications, particularly those designed to target IgE, like omalizumab, which are primarily used to manage severe allergic asthma; essentially, a patient needs to demonstrate a high IgE level to be considered a suitable candidate for this type of therapy. 

Fasting not required.