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  What are Allergies?
  Causes Of Allergy
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  Immune System Memory
  Sensitisation
  Atopy
  Types Of Allergy
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Causes of Allergy

The substances that cause allergic disease in sensitised people are known as allergens. They enter our bodies in a variety of ways:
  • Inhaled into the nose and the lungs
    Examples are: airborne pollens of certain trees, grasses and weeds, dust mite droppings, mould spores, cat and dog dander

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  • Ingested by mouth
    These are generally the things that we eat and drink, including prawns and peanuts
     
  • Injected
    Such as reactions to stinging insects and injectable drugs

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  • Absorbed through the skin
    Things we come into contact with: poison ivy, oak and cosmetics
The normal reaction of our body to invasion by foreign substances is to defend itself. This is the role of our immune system.

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