There are studies that show that immunotherapy is effective and safe for certain airborne allergies (some of them are referenced here https://en.wikipedia.org/w

There are studies that show that immunotherapy is effective and safe for certain airborne allergies (some of them are referenced here https://en.wikipedia.org/wiki/Allergen_immunotherapy https://en.wikipedia.org/wiki/Allergen_immunotherapy). Close friend of mine is going through immunotherapy for dust mite allergies for more than a year now, so far she had just a little improvement. To me surprising part is that immunotherapy is 100 years old treatment and we did not come up with anything better after a century of rapid advancements in science. Currently in US there are estimated 20 million people suffering from dust mite allergies alone and more than 50 million Americans suffer from allergies overall. Allergies are the 6th leading cause of chronic illness in the U.S. with an annual cost in excess of $18 billion. One of new approaches for treatment of airborne allergies is what this company is doing http://www.circassia.com http://www.circassia.com. They are working on new kind of therapy, which is trying to "teach" your immune system to not identify certain harmless airborne allergens (dust mites, grass, ragweed,...) as harmful. Treatment consists of 4 injection during a year period. They are in trial phase right now (I am not related to them).