The examination of public health law traditionally focuses on constitutions, statutes, regulations, and common law at the national and sub-national level. However, the determinants of health (e.g., pathogens, air, food, water, even lifestyle choices) do not originate solely within national borders. Health threats inexorably spread to neighboring countries, regions, and even continents. Peoples’ lives are profoundly affected by commerce, politics, science, and technology from all over the world. Global integration and interdependence occur “as capital, traded goods, persons, concepts, images, ideas, and values diffuse across state boundaries.” It is for this reason that law and policy need to be transnational, i.e., extending beyond soverei...