There are many excellent web-based support sites for persons who suspect they have allergies and want to learn more about them and controlling airborne allergen triggers.

Centers for Disease Control (CDC) Environmental Health

The National Institute of Environmental Health Sciences

American Academy of Allergy, Asthma and Immunology

Asthma and Allergy Foundation of America

Allergy and Asthma Network / Mothers of Asthmatics, Inc.

U.S. Environmental Protection Agency

MaryPaul Contract Microbiological Laboratories

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