What does the future hold for viral gene therapy?

Richard E Sutton Baylor College of Medicine, Department of Molecular Virology & Microbiology, Department of Medicine, Division of Infectious Diseases, Center for Cell & Gene Therapy, 1 Baylor Plaza, Houston, TX 77030, USA Tel.: +1 713 798 4096; Fax: +1 713 798 3586; rsutton@bcm.tmc.edu ‘The door is slowly swinging shut on viral gene therapy, and if substantial progress is not made within the next 5–10 years, it may be closed forever.’