“Genetic tests,” as Eric Topol, the medical geneticist described it, “are also moral tests. When you decide to test for ‘future risk,’ you are also, inevitably, asking yourself, what kind of future am I willing to risk?” Three case studies illustrate the power and the peril of using genes to predict “future risk.”

“Genetic tests,” as Eric Topol, the medical geneticist described it, “are also moral tests. When you decide to test for ‘future risk,’ you are also, inevitably, asking yourself, what kind of future am I willing to risk?” Three case studies illustrate the power and the peril of using genes to predict “future risk.”

— Siddhartha Mukherjee