Allergies are an exaggerated immune system response to generally harmless substances known as allergens. These substances can include pollen, dust mites, mold spores, pet dander, certain foods, medications, and insect
Allergies are an exaggerated immune system response to generally harmless substances known as allergens. These substances can include pollen, dust mites, mold spores, pet dander, certain foods, medications, and insect