When you have allergies and asthma, learning all you can about the substances in your environment that can set off your symptoms is important. For allergies and allergic asthma, these substances are called allergens.
The pictures of asthma allergens you'll find in this photo gallery can help you understand your triggers, especially since many of these allergens are too tiny to be visible to the naked eye. So, take some time to browse through this photo gallery and get to know your "enemies."
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