Research has changed the conceptualization of the causes and consequences of violence. Yet some questions remain unanswered. Infants and young children have largely been overlooked, and intraethnic and cultural group variations have not been addressed. There is still a need to address macro-level systematic discrimination in the health care system along with the intrapersonal physiological changes that result from exposure to violence. Fortunately, studies are beginning to show how longitudinal and intervention research can be safely conducted.