what is perennial allergy
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Perennial allergies may occur at any time of year—unrelated to the season—or may last year-round. Perennial allergies are often a reaction to house dust. House dust may contain mold and fungal spores, fibers of fabric, animal dander, dust mite droppings, and bits of insects.
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Answer:
Perennial allergies may occur at any time of year—unrelated to the season—or may last year-round. Perennial allergies are often a reaction to house dust. House dust may contain mold and fungal spores, fibers of fabric, animal dander, dust mite droppings, and bits of insects.
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