As Molbiogirl said allergies can be inherited. I have no known allergies but my wife has a minor allergy (erythema) to the adhesives in medical tape and band aides. My son recently showed signs he has her allergy and my daughter has exhibited no sign of this fairly minor yet odd allergy. Its also fairly common to find offspring who share their parents allergies. Some attribute this to transmissions from the mother in utero, but most studies disagree. If it were passed on in that manner a child wouldn't require the sensitizing exposure. For example, the first time in your life you get stung, you don't go into Anaphylactic shock, the second time is when you have to worry. Elderly who have never had allergies in their lives also develop spontaneous allergies.
Idiots speak louder than words
(yes its supposed to be ironical... twice)
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