"For the first time I think we have a chance to really change the course of Alzheimer's."

VIDEO:

"For the first time I think we have a chance to really change the course of Alzheimer's disease," says Dr. Reisa Sperling. She's leading the "A4 Clinical Trial" to see if a drug called Solanezumab can slow down or even prevent Alzheimer's disease. CBS News reports.

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More on the A4 Clinical Trial:

• A4 Study is 1st Step to an Alzheimer's Vaccination

SOURCE:

• CBS News in Washington