it was clearly noted that the mission could be accomplished by many groups, public and private, and by individuals". However, the government has a special function "to see to it that vital elements are in place and that the mission is adequately addressed" (IOM, 1988, p. 7). To clarify the government's role in fulfilling the mission, the report stated that assessment, policy development, and assurance are the public health core functions at all levels of government.