"Egg allergy is most common in infants under the age of twelve months and then becomes progressively less of a problem."
Allergy
Food hypersensitivity reactions that involve the immune system are referred to as food allergic reactions. Such reactions are far less common than is popularly believed, however, when they do occur, they can be serious.
In a food allergy the immune system reacts adversely to a food protein. Egg proteins are among the food proteins that may cause such reactions in predisposed individuals.