From clean drinking water, to seat belts, to immunizations, the impact of public health on every individual is undeniable. For undergraduates, an understanding of the foundations of public health is an essential step toward becoming an educated citizen. Public Health 101 provides a big-picture, population perspective on the determinants of health and disease and the tools available to protect and promote health. It examines the full range of options for intervention including use of the healthcare system, the public health system, and society-wide systems such as laws and taxation.