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A substance that causes an allergic reaction.
- ‘Allergies are caused by the body's immune system reacting to allergens as if they were harmful.’
- ‘Once a person is sensitized to an allergen or chemical, he or she may develop asthma.’
- ‘First, allergic reactions are caused by allergens, the three most common ones being dust and mites, pollen and nuts.’
- ‘Future exposure to the same allergens will cause the reaction to happen again.’
- ‘The next time you're exposed to the allergen, your immune system launches an allergic reaction.’
- ‘Gradually your body learns to accept the allergen as the harmless substance it is.’
- ‘If allergens in the air are an asthma trigger, pollutants can make the lungs even more sensitive to them.’
- ‘It is well known that vacuum cleaner bags capture large particles but can emit allergens that are too small to be collected in the bag.’
- ‘Wherever possible, the most effective way of treating allergies is to avoid all contact with the allergen causing the reaction.’
- ‘The goal is to desensitize you to specific allergens and decrease your need for medications.’
- ‘If you take away the allergens that were driving it initially, the inflammation is likely to continue.’
- ‘Your doctor may take tests to see what allergens are causing the hay fever symptoms.’
- ‘Substances that are normally harmless could act as allergens and trigger a reaction in certain people.’
- ‘The rash usually clears if the allergen is no longer in contact with the skin, but recurs with any slight contact with it again.’
- ‘During allergy seasons, the local news broadcasts usually tell you what allergens are in the air.’
- ‘In such an enclosed environment, allergens from one food can spread to another.’
- ‘Avoid things that could make symptoms worse, such as air pollution and allergens.’
- ‘Whether your eczema is due to an irritant, such as detergent, or due to an allergen, such as nickel, care and treatment of your skin is the same.’
- ‘Your allergic reaction happens when your body's immune system mistakes the allergen for a harmful invader.’
- ‘Eliminate any known allergens such as certain foods, dust, or pet dander from your household.’
Early 20th century: blend of allergy and -gen.
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