http://articles.mercola.com/sites/articles/archive/2008/01/02/immunotherapy-benefits-last.aspxExperts estimate that up to 20% of adults suffer from allergic rhinitis, or hay fever. Long-term immunotherapy for the treatment of common allergies involves 'desensitizing' patients by injecting them with tiny amounts of the allergen. Now, researchersenCommunityServer 2008.5 SP1 (Build: 31106.3070)