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A new study, called the DIAN study, is following multiple generations of family members across the globe with early-onset Alzheimer's disease. CBS News contributor Priya David Clemens reports on a Seattle family that is providing never-before insights into the disease's first signs

By Priya Shetty of Nature magazine A clinical trial that came under fire in India threatens to have a dual legacy: inflaming unfounded fears about a lifesaving vaccine and raising new questions about the management of medical research in the country. [More]

By Priya Shetty of Nature magazine South African teenagers could pocket as much as 2,700 rand (US$400) over the next 18 months in exchange for staying HIV-free.