Hereditary
There is clearly a hereditary
factor involved in allergy. A few examples. If one of your parents
has an allergy, you will have a higher risk of contracting an
allergy (20-40%) than if both your parents are non-allergic. If
both your parents are allergic, this risk becomes even higher
(40-75%). However, a hereditary predisposition alone does not mean
that you will actually develop allergic symptoms, as more factors
are involved.

