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Indoor allergies stem from allergens, triggers that cause the body's immune system to react defensively, fighting what it believes to be harmful even though it is not. Indoor allergens can include substances such as pet dander, mold, dust mites, cockroaches, and cigarette smoke.
Fifty-two percent of U.S. households have at least six detectable allergens hiding inside with 46 percent of U.S. households having three or more allergens at increased levels.
Symptoms of indoor allergies may include mild reactions such as sneezing...