Laboratory (BNL) continuing to provide the follow-up through support from the U.S. Department of Energy (DOE). This report concerns an evaluation conducted by a multidisciplinary team for the DOE's Office of Health, of the appropriateness of the Marshall Islands’ medical surveillance program as operated from 1955 to the present, by AEC andits successor agencies. It also concerns determination of the scope and type of medical surveillance that is indicated for this population through the year 2000 with respect to the radiological health hazards of the exposure to fall-out in 1954. Current knowledge of the nature of radiation-induced health effects and the estimates of their associated risks to health were used as the basis for addressing the following specific questions: 2.1 Whattype and scope ofsurveillance should have been implemented to effectively monitor this population for development of possible and probable radiogenic illnesses/diseases and chronic conditions, by 5-year intervals between 1955 and 2000? 2.2 Whattype of surveillance/tests would detect the developmentof such possible and probable radiogenic illnesses/diseases and chronic conditions, and how frequently should the surveillance be done? Whatsurveillance should be provided until the year 2000 to the exposed population of the Marshall Islands? SULRUES