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Scientists Still Hopeful About Gene Therapy's Promise

04:18
A technician at pharmaceutical company pursuing new gene therapy treatments collects re-engineered viruses, called "vectors." Viruses, stripped of their virulence and ability to replicate, are the most common delivery vehicles for healthy DNA. (AP)
A technician at pharmaceutical company pursuing new gene therapy treatments collects re-engineered viruses, called "vectors." Viruses, stripped of their virulence and ability to replicate, are the most common delivery vehicles for healthy DNA. (AP)

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