Allergies affect approximately one in five Americans. How much do you know about allergies? Take our short quiz. Knowing the facts may help you arm yourself appropriately to keep this season’s allergies at bay. Children outgrow environmental allergies. True False Allergies can be life-threatening. True False Pet fur is a common source of allergies. True False Your clothes can protect you from poison ivy and poison sumac. True False Shellfish allergies are related to the iodine in these foods. True False Many people are allergic to milk. True False Organic foods will not eliminate your food allergies. True False Allergy shots don't work. True False Moving to states in the Southwest will likely have little impact on outdoor allergies. True False Nasal sprays have many side effects. True False