Controversy has arisen over the long-standing practice of collecting family health and behavioral history information in the course of conducting biomedical research. Identifiable individuals (third parties) on whom investigators collect private data through primary research subjects (probands) also are considered research subjects. At issue is whether informed consent is required from third parties prior to obtaining information about them from probands. A recent federal regulatory ruling dictates that investigators must either obtain informed consent from all third parties or their research must qualify for a waiver of consent. Because of the ruling, a traditional family medical history questionnaire, typical of those routinely used in genetic epidemiologic studies of familial risk, failed to meet the criteria for the waiver. The implications of this ruling are far-reaching. They could influence the quality of research in the United States on the causes of most human diseases. To enable continuing medical and bioethical education on the topic, in March 2001, Virginia Commonwealth University hosted a 2-day open conference, "Third Party Rights and Risks: A Forum on Informed Consent from Persons Affected by the Study of Human Subjects." International leaders from the fields of biomedical ethics and law convened with federal regulatory officials, Institutional Review Board members, academic and industry scientists, and patient-family rights advocates to discuss and debate this critical topic. Conference presenters submitted papers to clarify the issues, promote continued debate, and assist in the formulation of policy recommendations regarding third-party rights and risks.