The American Academy of Allergy, Asthma and Immunology (AAAAI) is a professional organization representing allergists, asthma specialists, clinical immunologists, allied health professionals, and others with a special interest in the research and treatment of allergic disease. The AAAAI Web site provides information about current research and clinical trials, educational resources, and maintains the National Allergy Bureau, a comprehensive pollen information source with U.S. and Canadian pollen count information.

The American College of Allergy, Asthma, and Immunology (ACAAI) provides allergy information for consumers, including a nationwide allergist referral service.

The Asthma and Allergy Foundation of America (AAFA) provides information and support for people who have allergies or asthma. The AAFA has local chapters and support groups. And its Web site has online resources, such as fact sheets, brochures, and newsletters, both free and for purchase.

The Food Allergy and Anaphylaxis Network (FAAN) publishes several newsletters and dozens of books, booklets, and videos designed to educate people about food allergies. The nonprofit organization also works on federal, state, and local initiatives in such areas as food labeling, schools, emergency medical services, camps, restaurants, and airlines. The FAAN Web site includes links to children's and teenagers' food allergy Web sites.

The National Institute of Allergy and Infectious Diseases conducts research and provides consumer information on infectious and immune-system-related diseases.