Hay fever is a seasonal allergy to pollens; the term “hay fever,” however, is a less than adequate description since an attack of this allergy does not incur fever and since such an attack can be brought on by sources other than hay-producing grasses. Hay fever is generally caused bay air-borne pollens, particularly ragweed pollen. The amount of pollen in the air is largely dependent on geographical location, weather, and season. In the eastern section of the United States, for example, there are generally three periods when pollen from various sources can cause intense hay fever suffering: in the springtime months of March and April when pollen from trees is prevalent, in the summer months of June and July when grass pollen fills the air, and at the end of August when ragweed pollen is at its most concentrated levels