In the area of gene therapy, progress has been slow, but in some cases remarkable.

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He said the drug would slow down the progress of the disease and allowed patients to take advantage of other treatments like immuno-therapy.

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There she made progress, with the help of tutors, English classes and therapy.

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Despite the slow progress, Dr High says she is optimistic about the future of gene therapy.

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Levine had no lower body movement after he fell in September 2011 but said he has made progress in walking as the result of six-days-a-week therapy.

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UNAids is monitoring progress against targets such as reducing sexual transmission of HIV by 50% by 2015, and providing antiretroviral therapy to all 15 million people who need it.

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Karen Siff Exkorn said her son Jake, who was diagnosed with a "classic case" of autism at 2 years old, made slow but steady progress with a combination of 40 hours a week of behavioral treatment, as well as speech and occupational therapy.

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