1) Allergies are the 5th leading chronic disease in the US, affecting over 40 million Americans. Common indoor allergens include pet dander, dust mites, bacteria, pollen, mold, and dirt. 2) Allergens are found throughout the home, especially in carpets, upholstery, bedding and air filters, with dust mites living in carpets and pet dander affecting many homeowners. 3) To reduce allergens, the document recommends vacuuming weekly, professionally cleaning carpets every 3-4 months, washing bedding regularly, replacing air filters, bathing pets, and controlling temperature and humidity levels in the home.