The most common allergic diseases caused by indoor allergens are allergic rhinitis, sinusitis, asthma, and allergic skin diseases (dermatitis). Figure 4 shows the generally accepted ranges of prevalence for these conditions in the United States. Based on these and other data, we can predict that one out of five Americans will experience allergy-related illness at some point during their lives and that indoor allergens will be responsible for a significant share of these cases. As such, indoor allergens are a major public health problem in the United States.
Some interesting facts about allergies and the indoor environment follow:
More than 50 million Americans—one out of five—suffer from allergic rhinitis (hay fever) and other allergic diseases, many of which are related to exposure to allergens in indoor environments
Allergic rhinitis is the single most common chronic disease experienced by humans.
The level of allergen exposure in the home relates to the risk of