What causes someone to be allergic to pollen?
April 27th, 2010 | 
Author: It seems that 99% of the world has allergies to pollen, and I am the only 1% that has NO allergies.
Why are so many people, and even animals, allergic to pollen?
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It’s to do with the immune system reacting to pollen in a way it reacts to say, a cold virus, your immune system releases histamines to fight off the harmless pollen which it sees as a threat