Her studies paved the way for a growing body of interdisciplinary investigations by researchers in nursing, medicine and public health. National and international policymakers frequently seek her expertise in exploring IPV and its potential health effects on families and communities. She has been conducting advocacy, policy work and research in domestic violence and health outcomes since 1980. Her global work includes co-chairing the Steering Committee for the World Health Organization Multi-Country Study on Violence and Health and co-chairing the IOM Forum on Global Violence Prevention. Campbell is also active in national policy work, testifying before Congress and maintaining membership on the congressionally appointed U.S. Department of Defense Task Force on Domestic Violence.