There is clearly a biological/genetic basis to stuttering. Stuttering is not caused by a virus, so a medical cure is not what you're really looking for. The motivation to change the way you speak and to accept stuttering as a part of you is the most important part of any therapy regimen. A qualified speech pathologist will treat both aspects of your speech and have you work up to social scenarios using established techniques. If you really want to get better and improve your self-esteem, I think you should call universities and clinics in your area.