For the first time, an experimental vaccine taken by 20 healthy adults is successfully and safely stimulating an immunity against Ebola. Judy Woodruff talks to Anthony Fauci of the National Institutes of Health on how the vaccine was developed and…

To understand more about the link between addiction and genes, science correspondent Miles O'Brien drinks a mixture of 30 grams of pure ethanol and Diet Coke, the equivalent of three stiff drinks, and undergoes a series of tests.

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