Inclusion:1. ≥1 anaphylactic reaction to accidental trace exposure to HE within 12 months pre‐enrolment2. Previous HE specific IgE & SPT ≥ 3 mm with raw egg white3. DBPCFC pos at ≤ 0.9 mL raw HE emulsionExclusion1.Poorly controlled asthma2. Parents unreliable3. Sensitized to other foods. This evidence concerns the gene IGHE and hereditary elliptocytosis.