You have no idea exactly what this experimental gene based treatment is 'designed' to do, neither do I. It's an entirely new method of delivery with no known history or established long term safety for mass use. Also an individual with an allergy doesn't always die from the anaphylactic shock each time they are exposed to the allergen, but every body understands it's a bad idea to do it even once. Now lets attempt to inject a known allergen into the entire population at minute doses.