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Europeans were lactose intolerant for 4,000 yearsPreview
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2014-12-18 07:05
a food that triggered only mild symptoms on one occasion may cause more severe symptoms at another time....may cause...
This is only a possibility. This does not exclude, that many people never have a severe reaction. And it does not exclude that even if such a risk of a severe reaction does exist, it is so rare that it does not prevent the allergic persons to pass on their genes... An opportunity these persons might never have had, if they rather starved than accepted the risk.
Btw.. a friend of mine is allergic to flavour enhancers. Not really a big deal. He gets some minor skin problems. From time to time he says (more or less): "F**k it... today I want to eat my ". I doubt he would do it, if doing so he constantly would had the sword of Damocles of a deadly reaction over his head.
I looked for some statistics, but did not have much time. So this must be enough:
http://www.medicinenet.com/script/main/art.asp?articlekey=15618
As many as one-third of peanut-sensitive patients have severe reactions, such as fatal and near-fatal anaphylaxis. ("Anaphylactic deaths in asthmatic patients," Allergy Proc., 1989)I would interpret this that two-thirds never have fatal or near-fatal reactions.
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