Inclusion:1.5–15years2. Hx IgE hen's egg allergy3. sIgE ≥0.35Ua/ml4. +ve DBPCFC ≤500 mg dried raw hen's egg white powderExclusion:1.Uncontrolled asthma2. Uncontrolled atopic dermatitis3.Grade 5 anaphylaxis on DBPCFC. Here, IGHE is linked to anaphylaxis.