There are so many different types of allergens that can trigger an allergic reaction that it is almost impossible to enumerate them all. The most common allergens include pollen grains, dust, moulds, medicines, insects' bites and stings and others.
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There are so many different types of allergens that can trigger an allergic reaction that it is almost impossible to enumerate them all. The most common allergens include pollen grains, dust, moulds, medicines, insects' bites and stings and others.