A member asked:

What r the chances that a 40yr old will suddenly be allergic to a certain food, if no history of food allg exists? lots of med allergies tho.

3 doctors weighed in across 2 answers

Allergy: This is very possible. Some people develop allergic reaction to certain materials very late in their life.

Answered 9/10/2013

4.9k views

Thank

Possible: Negative past allergy history has zero predictive value for future allergic reaction.

Answered 9/10/2013

4.9k views

Thank

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