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Do allergies serve a purpose or are they just bad evolution?

Food, pollen and animal allergy symptoms seem to me to just be the body destroying/damaging itself for no reason - in people without those allergies they can ingest/be around the offending substance with no harm done to them at all. Do these allergies serve a purpose in sufferers or even have any reason behind them at all besides bad evolution?

Asked By: Ethan B - 6/26/2011
Best Answer - Chosen by Asker
Allergies are just your body rejecting a foreign substance because it thinks it might be a threat. Our immune systems evolved to be really paranoid because it's better to react to things you don't need to than to not respond to a dangerous invader. On the whole, our immune system does a pretty good job, but it can... More
Answered By: xezlec - 6/29/2011
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