sounds promising, however i am allergic to cats and as many know i have had four at one time, two now, i still get slight problems ,but nothing like i was before i have managed to desensitize myself by simply putting myself amongst all the cat fur, the cats, they sleep with me,not in the bed but at the foot, their choice, and my own vet is allergic to cats, and deals with that on a daily basis and loves cats, so i am thinking maybe this is not all that necessary, and would there be side effects from the injections, some they might not even know about yet, still it does sound hopeful.