There are more then ten million Americans who have an allergy to pollen alone, this is about one in every five people in the United States. Suffers of allergies have a disorder of their immune system and that is what causes the symptoms. Many people are allergic to dust, pollen , nuts, and bumble bees and they are so sensitive to these allergies that the allergy could become life threatening and turn into an anaphlyactic reaction if it doesn’t get treated immediately.
In hot dry climates it has been found that there are more allergens floating around in the air, rather then humid and cooler climates. Another time when there are a lot of allergens in the air is in the spring and early summer this is because plants and trees are budding helping pollen to be thrown into the air.