The shift to prevention and health promotion is an example of how policy makers aim to rationalise and organise both health systems and patients' health practices. By applying a perspective from empirical science & technology studies (STS), based on qualitative research methods, the chapters of this book present a view behind the scenes and zoom into the micropolitics of prevention and health promotion. They analyse how patients are framed as being "at risk", how preventative regimes shape medical practices, and what its practical consequences are in patients' everyday lives. This makes the insights of this book relevant for prevention and health promotion practitioners, public health policy-makers and researchers.