Hydrolyzed Egg and Tolerance Induction

Inclusion Criteria: * Child of any ethnicity aged between 12 and 66 months at the time of enrolment * Positive Skin Prick Test (SPT) to egg white within the last 3 months * Either positive oral challenge OR convincing history, defined as an immediate (\<1h) reaction following isolated ingestion of egg, positive SPT to egg white and positive sIgE (\> 0.35 kU/L) for at least one of the following: egg, egg white, ovalbumin, ovomucoid, within the last 12 months * Having obtained his/her signed legal representative's informed consent. Exclusion Criteria: * History of severe anaphylaxis to egg * Significant pre-natal and/or post-natal disease * Child on systemic drugs (e.g. antihistamines, beta-agonists, ACE-inhibitors) according to half-life at time of enrolment * Congenital illness or malformation that may affect normal growth (especially immunodeficiency) * Child whose parents / caregivers cannot be expected to comply with treatment * Child currently participating in another interventional clinical trial