re: Human Gene Therapy

Have you read about the Human Microbiome Project?

LINK

quote:

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Examinations of DNA sequences served as the equivalent of an old-time microscope, said Curtis Huttenhower of the Harvard School of Public Health, an investigator for the microbiome project. They allowed investigators to see — through their unique DNA sequences — footprints of otherwise elusive bacteria.

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Eta: Doubt this helps with going blind, but it's somewhat relevant.