In part three of our week-long series, we look at tests that could tell who may get Alzheimer's. Scientists are identifying the bio-markers for the disease and can now predict with reasonable certainty who is likely to get the disease years before symptoms occur.
Scientists are excited about this because they believe there may be promising drugs to prevent or slow down the disease with early treatment. This poses a dilemma for many however, because they must choose to possibly live with the knowledge that they have the disease, without the certainty that the new experimental drugs will be effective. In the third part of our week long series, Here and Now's Sacha Pfeiffer reports on the new research and the people facing the difficult question - to test or not to test.
This segment aired on December 28, 2011.