Autoimmune Diseases: NIH resource, including disease examples, quick facts, and the latest research-from the US National Institute of Allergy and Infectious Diseases

Immune Deficiency Foundation: National, non-profit organization to improve the diagnosis and treatment of patients with primary immunodeficiency diseases through research and education

MCS Referral and Resources: Professional outreach, patient support, and public advocacy devoted to the diagnosis, treatment, accommodation, and prevention of multiple chemical sensitivity disorders