Allergens can trigger allergic reactions upon skin call, when they are breathed, swallowed or injected. An allergic reaction starts when you touch, breathe in or swallow an irritant. In feedback to this trigger, the body starts making a kind of healthy protein called IgE or immunoglobulin E. Allergic reactions are rather usual as well as might occur seconds to hrs after contact with the irritant. Though lots of allergic reactions are moderate, others may be dangerous or lethal.

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