GAINESVILLE, Fla. --- The average person's heart pumps about a gallon of blood per minute, a rate that can easily triple or quadruple during exercise. The rapid flow of blood through the body is a major roadblock to the use of gene therapy to cure diseases. When injected into the blood, vector viruses – which carry corrective genes – tend to shoot past the target organ or tissue rather than sticking to it, like grains of sand moving past stones in a fast-flowing river.
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