 [ Symptoms ] what predicts the severity of a food allergy [ Disease ] there is no test that will predict the severity of a reaction the amount of ige antibodies produced does not correlate with how severe a reaction is [immunoglobin e antibodies ige are produced in excess by allergic people ] at one point a child may have a severe reaction and another time it may be much less severe it could be due to the amount of the food they ate whether or not it was an empty stomach if they already had a viral infection    all kinds of factors